Platform’s functions
Getting started
Free trial registration
You can register for 14-day free trial access by this link - https://volfix.net/free-trial/. After registering for test access, the trader will receive an email with a login and password in an email from trial@volfix.net. Please note that test access is provided only once.
Platform login instruction
After receiving login and password, download the platform. Login and password are case-sensitive.
If you accidentally deleted the email, you can reset the password. Click on the Forgot Password field, enter your VolFix username, and click Apply. An email will be sent to your mail with further instructions for resetting your password.
What to do if you have not received an email with login information
Before checking, please make sure you have entered your email address correctly. This problem sometimes appears. If you entered your email incorrectly, please register to get test access again and enter the email address correctly.
If your email address is correct, please enter trial@volfix.net in the search box of your email service.
Please check your Spam folder if your search does not return any results.
If there is no letter in the Spam folder, please try to use another email service, as it is possible that your mail service is blocking automatic service emails or your inbox is full.
Also, make sure that your inbox does not run out of space, as in this case, you will not be able to receive emails.
We recommend using mail providers like Google, Microsoft, Yahoo, and other large technology companies, for example, ending in @gmail.com, @outlook.com, etc., as these mail services are stable (some mail providers may block automatic service letters).
How to get market data during free trial
To get free access to the real-time CME exchange quotes, you need to fill in a VolFix Free Demo with CQG Datafeed form.
You will then receive a username and a password from CQG in your email.
Enter those credentials in the Market Watch -> setup -> Connections -> New -> Demo CQG.
System requirements
CPU: 2 core, frequency 2.4 GHz. Recommended: 4 core, 3.2 GHz
RAM: 2 GB. Recommended: 8 GB
Internet: 10 Mb/s. Recommended: Ethernet 100 Mb/s
Display: Full HD. Recommended: 2-4 2K displays
Video card: any. Recommended: NVIDIA/AMD 1Gb RAM
OS Windows: Windows 10 (1809 or later) 64-bit, Windows 11 64-bit.
OS MacOS: macOS Big Sur (11) or higher. CPU: Intel or Apple silicon.
Firewall setup: Allow all ports for hosts:
b1.volfix.net,b3.volfix.net,b4.volfix.net,b5.volfix.net,b6.volfix.net,b7.volfix.net,
t1.volfix.net,t4.volfix.net,t5.volfix.net,t7.volfix.net,t8.volfix.net
How to optimise Windows and macOS for VolFix
Charts types and configuration
How to open a chart
Platform launch and Chart opening
You can open a chart by clicking Component-Chart.
Type a symbol in the opened chart and select one from the dropdown list. Select the chart type and timeframe and click Apply. To open a second chart with the same settings, clone an initial chart: Setup-> Clone Window.
Cluster chart
Each cluster displays the total traded volume at each price level of each bar.
On the control panel user can switch to a double cluster chart and display Sell/Buy clusters (bid/ask), volume, delta, delta%, trades, max tick, and ticks (number of ticks).
Settings can be found in Setup-Settings-Cluster/Box
Here is the tutorial video with all settings explanation (time codes are in the description) - Cluster Profile | Video guide
Classic (market) profile
Classic Profile (market profile) | Basic settings
Market profile displays information on market activity based on price, volume, and time frame information on a single chart. Developed by J. Peter Steidlmayer, a trader at the Chicago Board of Trade (CBOT).
Market Profile displays the frequency at which a particular price level has been traded during a specified time period. Prices that are frequently traded are known as the "value area." It represents a zone of equilibrium between buyers and sellers. Market profile captures all the activity in this zone and allows you to understand which side dominates at a given moment in time.
To open a market profile, switch to the daily or weekly timeframe and choose "Classic" in the Cluster Type field.
Settings can be found in Setup-Settings-Classic profile
Tick chart
Tick charts are designed to analyze trading activities on the smallest time scales. It allows finding ticks with the biggest volumes and assists you in finding the perfect entry point to minimize stop loss and maximize potential profit.
Line Time mode - Every second will be displayed on the chart, even if there was no tick. If this function is turned off, the empty time intervals with no ticks will be removed. In other words, the Line Time function divides the timescale by seconds.
Settings for tick chart can be found in Setup-Settings-Bar/Tick
Bar chart (candlestick chart)
Standard bar chart that allows displaying 2 separate instruments using “2nd Chart” function.
On the control panel user can switch to Candles.
There are such types of bars available:
- HLMV - display of high, low, and max volume of the bar
- High-low - bar displaying only with maximum and minimum prices
- OC-MV (Open-close-Max Volume) - display of bar with opening and closing prices and maximum volume of each bar.
- Heikin Ashi
Multi chart
Multi Chart | Searching for short-term market trends
Combined analytical bar chart with the ability to simultaneously display different time periods of equal length.
The opportunity to see the entire futures contract in the form of bar charts in one window, where 11 time periods are displayed simultaneously.
Bars are equipped with a filtration system and visualize maximum volumes with unconventionally high values.
To open multi chart, open bar chart, first. Then, activate “Multi chart” button on the control panel.
To configure needed periods, click on the panel in the top right corner of the chart. With “multi chart period” - Day, we can display the chart of up to 11 days on one chart.
“Auto range” button loads the days in order starting from the current date. With a right-click on a certain day, user can delete the date.
Settings of multi chart can be found in Setup-Settings-Miscellaneous.
Box chart
This type of chart represents a unique visualization type, combining bars into boxes based on the selected time interval.
Using Timeframe 2 function, user can display the volume or delta profile and POC level of each box (for example, profile for each M5 box)
Cluster limits can be set up in Setup-Limit-Volume. Settings can be found in Setup-Settings-Cluster/Box.
Reverse chart
Reverse Chart | Tool for finding reversal points
The idea behind the reverse chart is to find reversal points in the market. It will be very useful for reversal strategies. It is characterized by the fact that bars are built not by time, but by price movements.
There are two key parameters in the reverse chart: Volatility and Model. They are counted in pips. Volatility parameter is responsible for the trend breaks you see on the chart. For example, for the chart to reverse, the price must move 4 pips in the opposite direction - this is the specified value in the “Volatility” field on the control panel. When the price passes 4 pips, we see the local trend reverse on the chart.
The model parameter is calculated according to the same principle, but it is responsible for the coloring of the chart. When the price passes the specified number of pips against the current trend, the chart is colored in the opposite color.
The idea is to pick up the optimal volatility and model parameters that would signal trend reversals with greater probability.
Range chart
A type of chart in which bars are not based on time, but on parameters such as volume, number of pips, delta, and number of trades.
For example, the bar closes when a specified volume value is traded.
“Range bar size” chart is built on the base of pips, the price passes in any direction.
Histograms configuration
Vertical histogram
Vertical Histogram | Horizontal Histogram. How to set up histograms
Vertical histogram can be configured in Setup-Studies-Vertical histogram
The first 2 options are bar histograms (Line=OFF). All others are line histograms. You can configure any set of histograms by selecting from the dropdown list (Type).
To activate a certain histogram, select one from the list and turn “State” to ON.
"Visible scale" option allows the histogram to be scaled only based on the visible part of the chart.
Types of vertical histograms:
Volume
Delta
Delta% - sell/buy imbalance as a percentage of the total volume
Trades
Maximum trade
Maximum tick
Ticks
Day cumulative delta
Chart cumulative delta (for the entire loaded period)
Average Volume of a cluster. Calculates as the total volume of the bar divided by the number of clusters.
Weis Wave
Cash (only for crypto and stocks)
Open Interest Delta - change in open interest from bar to bar.
Open interest
Reverse Init Volume (only for Reverse Chart)
Bar Size
Relative Volume. Displays the volume as a percentage relative to the average bar volume.
Second chart delta (available only in bar chart). Shows which of the instruments outperforms the other.
Horizontal histogram
Vertical Histogram | Horizontal Histogram. How to set up histograms
Horizontal histogram can be configured in Setup-Studies-Vertical histogram
Up to 10 histograms can be placed on one chart simultaneously. To activate a histogram, select Type, Time Frame (TF), and turn “State” to ON.
Such horizontal histograms are available as:
- Volume
- Delta
- Trades
- Ticks
- Option OI (option open interest)
- Hidden Ticks (available only for stocks and ICE)
- Classic (market profile). Available only in classic (market) profile chart.
"Self Area" option, which allows you to display the histogram on a separate axis if there are several of these histograms.
How to display several histograms simultaneously
Using histograms for different timeframes and MV Only (max volume only) function, it is possible to display only POC lines (lines of maximum volumes for chosen periods).
How to make POC analysis in Volfix
“Levels” allows showing the first few highest volume prices.
POC ray label font can be configured in Setup-Settings-Miscellaneous-H.Hist ray label font
Lines
To add a price line to the chart, click on the price scale with the left mouse button, hover the cursor over the price you need, and confirm with a second click.
To delete the line select it with the left mouse button and right-click to delete it.
Right-click on the line label opens a window with the settings for this line.
Margin - is the indent of note text from the price scale.
Visibility is the line display setting. By default, new lines are displayed on all lower timeframes. It is possible to change default settings in "market watch" -> setup -> Global Settings-> User Line Visible
To change the default color for the lines, go to Setup-Settings-Miscellaneous-User line back.
Alerts
How to use Alerts in VolFix Platform
To create price alert, switch to Alert in the upper right corner of the chart and place alert by clicking on the price scale.
By right-clicking on the alert line label, a window with settings opens. Here, you can specify the type of alert: local or server.
Local alert will not be triggered if the platform or chart is closed. Therefore, if we are on the go but waiting for a certain price to be reached, change the alert type to the server one. The server alert will work even when the platform is closed. A push notification about this alert will be sent to the mobile app.
The General alert settings are located in Market Watch-Setup-Alert Settings.
Mobile app trades - activates sending push notifications about new trades to the Volfix mobile app.
Mobile app local - activates sending notifications about triggered alerts to the mobile app.
Disable all timeout - disables all alerts for the specified number of minutes.
Alert beep - activation of a sound signal when alerts are triggered, except for price alerts
Price alert beep - activation of a sound signal when a price alert is triggered
Price alert message - a pop-up notification about a price alert.
New trade beep - allows you to turn off the sound accompaniment of orders execution.
To set up volume alerts, go to Setup-Limits and activate “Alerts”. “Repeat” function - allows the alert to be ringing until we disable it manually.
To receive a push notification to the mobile app, you should:
- Activate the "Send to mobile device" function.
- Check whether the “Mobile app local” function is activated in Market watch-Setup-Alert settings.
Volume limits setup
Volume limits can be configured in Setup-> Limit -> Volume.
To add a new limit, provide needed value and settings and click “Add”. To add another limit, provide the required value and limit settings again and click “New”.
If you want to adjust created limits, click “Edit” after applying all the changes.
Changes in limits configuration are saved automatically for each instrument and timeframe, as well as for all windows with this instrument.
Drawing tools
Drawing tool menu can be opened by clicking on the label in the bottom right corner or with Ctrl+D hotkey.
Here you can find lines, figures, Fibonacci retracement, and dynamic profile.
After applying any of the available tools, you can configure it: highlight it with one click and click on the cogwheel to open settings menu, or just right-click on the profile border to open settings menu.
Hotkeys
Global hotkeys can be configured in Market watch-Setup-Global hotkey
Hotkeys for trading can be found in chart window-Setup-Settings-Hotkey
Trading
Accounts connection guide
Full instructions on account connection are available at this link - https://volfix.net/trading-gateways/
How to start trading
To start trading, switch the window to trading mode by activating the «Trading» button in the window header. Then select an account and a symbol and click Apply.
How to place limit and stop orders
How to trade from the VolFix platform | Buy-Sell Limit, Buy-Sell Stop orders
To place “buy limit” order, activate “Auto buy” button, click on the price scale below the current price, and confirm order sending by the second click on the necessary price. When placing a buy order above the market price - you set a “buy stop” order.
To place “sell limit” order, activate “Auto sell” button, click on the price scale above the current price, and confirm order sending by the second click on the necessary price. When placing a sell order below the market price - you set a “sell stop” order.
Order send confirmation can be turned off in Setup-Trading settings-Confirm order send-Off
To cancel an order, right-click on the order and confirm. You can also cancel an order in the “Working Orders” panel by right-clicking on the order.
How to set Stop Loss and Take Profit, Bracket orders
How to set Stop Loss and Take Profit, Bracket orders
Stop loss and take profit can be added in two ways:
- Bracket orders set up before the position opening (recommended). Click on the “Bracket orders” area to set it up.
- Adding Bracket orders to an already open position. When position is open, make sure all orders are canceled. Then, on the control panel, click “Add Bracket.”
Master/Slave function (trades duplicating)
Full tutorial guide can be found in this video - Master/Slave - How to copy trades to multiple accounts
Risk management
Risk Management System | How to control risk in VolFix
Instructions to risk management can also be read in this article - https://help.lmitrade.com/knowledge-bases/2/articles/72-how-can-i-set-my-own-risk-management-system?lang=en
Studies
Studies | Volfix indicators guide
Volume/Profile tools
Bar complete
“Bar Complete” shows the degree of bar completion as a percentage.
Bar size
“Bar Size” displays the size of each bar in pips.
COT High/Low
COT High/Low - is cumulative delta since making a new high/low of each bar or retesting the previous one. It is displayed at the top and bottom of each bar.
COT High is the cumulative delta since making a new high. As a rule, it is negative.
COT Low is the cumulative delta since making a new low. As a rule, it is positive.
When the price retests the high or makes a new one, the COT high will be reset and counted from the beginning.
The indicator shows the market's reaction to a new high/low. If COT high is strongly negative and price drops, we consider buyers refused to buy at that price. And if COT high is negative but is growing at the moment, buyers are entering the market. In other words, they accept the new high and push the price up.
Dynamic POC
The Dynamic POC (Point of Control) indicator tracks and displays the price level with the highest traded volume for the current trading day on a chart. It dynamically updates throughout the day, reflecting real-time shifts in the POC as new volume data emerges. This allows traders to monitor the evolving key price level where the most significant trading activity occurs. It allows analyzing how the price reacted to the POC level throughout the day.
Grid
How to set up period separators (Grid)
“Grid” allows to highlight needed time intervals or price ranges.
The whole configuration process is done through the control panel at the top of the “Grid” settings window. To turn off the grid, set the State field to Off and click Edit and vice versa.
Full video instruction is available by the link above.
Heatmap
Visual display of the depth of the market and its history. Each bid/ask value of the order book corresponds to a specific color, representing the depth of the market in the form of a heatmap.
Lower cut OFF% - allows you to ignore 20% of the smallest DOM volumes.
Upper cut OFF% - makes the scaling and, thus, heatmap colors more stable, not affected by extraordinary short-term sizes. Any volume above the critical value will correspond to the same color intensity.
Horizontal histogram
Vertical Histogram | Horizontal Histogram. How to set up histograms
For more details, please see the “Histograms configuration: Horizontal histogram” section.
TF2 Settings (Timeframe 2)
Volume/delta profiles for selected time intervals. This function is activated on the control panel.
TF2 settings can be found in Setup-Studies-TF2 settings.
Settings:
- Type - volume, delta, vol-delta
- Price tick size - profiles tick size
- Time shift - allows to shift the time of profiles for example from odd-numbered to even-numbered hours
- Transparency of profiles
- Max volume ray always - building POC rays for the selected number of days in the “Ray always, last day” field.
- Show high-low lines of the profiles
- Vertical histogram of selected interval: volume or delta
TPO cluster
Time price opportunity (TPO) shows the value area where most volumes were traded (70% of volumes by default).
Unfinished auction
To understand the idea behind this indicator, you should understand what a “finished auction” is.
Each bar is an auction where sellers and buyers meet each other. Auction is considered finished when buyers have stopped adding bids. In the Sell/Buy (Bid/Ask) cluster chart, you will see zero contracts on the Sell side. This means that there's no one else willing to buy at that price. And the auction is considered finished. The same for sellers stopped adding asks.
If there are traded contracts on the high/low of the bar: both on the Sell side and on the Buy side, and the bar is closed, having formed a high and a low, then this situation is called an unfinished auction. And since, at the high of the bar, buyers were ready to buy, then there is a probability that the price will retest this level to complete the auction process.
Vertical histogram
Vertical Histogram | Horizontal Histogram. How to set up histograms
For more details, please see the “Histograms configuration: Vertical histogram” section.
Volume fixing
Volume Fixing | Defining key levels using Volumes
It allows finding the total traded volume/delta at a given interval at a given price.
How the volume is calculated? For example, in the 1-hour timeframe, the indicator divides the chart into 1-hour intervals. And if one of the prices for a 1-hour interval reaches 7 thousand contracts traded volume, then this price is marked in the chosen color.
“Max value only” option highlights only the maximum volume of those that exceed the specified value.
More information on how all the features and ways to use the indicator in the video above.
Volume heatmap
Visual display of volume profiles as a heatmap: a certain volume corresponds to a specific color. From blue to red - from the smallest to the highest volumes. The volume heatmap is displayed for a visible part of the chart.
Using volume heatmap, user can see zones of volume accumulation.
Upper cut OFF% - makes heatmap colors more stable, not affected by single extraordinary profiles. Any volume above the critical value will correspond to the same color intensity.
90% means that 10% of the highest volumes correspond to the same color.
Technical indicators
VWAP
VWAP measures the average price of a security based on both the price and volume of trades over a specified period. It is calculated by totaling the dollars traded for every transaction (price multiplied by the volume) and dividing by the total volume.
There are VWAP deviations available: as a percentage and in pips.
Also, anchored VWAP is available by selecting “Custom day” and specifying the needed time.
T/A Studies (technical analysis)
ATR
The average true range (ATR) is a market volatility indicator. It measures the difference between high and low prices i.e., the average size of a bar based on 14 bars, as a rule.
Higher ATR means higher market volatility.
Bollinger bands
Bollinger Bands is a technical analysis tool that consists of a simple moving average (middle band) and two standard deviation-based bands (upper and lower) plotted above and below it. The bands dynamically widen or contract based on market volatility, helping traders identify overbought or oversold conditions, potential price breakouts, and trend strength.
Moving average
There are 5 moving averages available, including simple and exponential moving averages.
Pivot points
Pivot point is an intraday technical indicator used to identify trends and reversals.
Pivot Points provides three key support and resistance levels using daily, weekly, or monthly timeframes.
Support and resistance levels are calculated based on the pivot point which is the average of High, Low, and Close prices of the previous period.
PP - pivot point
R1/2/3 - resistance levels
S1/2/3 - support levels
RSI
The relative strength index (RSI) is a momentum indicator used in technical analysis. RSI measures the speed and magnitude of price changes to evaluate overvalued or undervalued conditions.
In theory, the area below 30 is considered oversold (red-colored), while the area above 70 is considered overbought (green-colored).
Super Trend
SuperTrend is used to identify market trends and potential entry and exit points. The indicator is derived from a combination of the Average True Range (ATR), which measures market volatility, and a multiplier factor.
By default, the SuperTrend Indicator uses a multiplier of 3 and a period of 14 for ATR. The ATR period represents the number of days, while the multiplier is the value by which the range is multiplied. Users can customize these parameters according to their preferences and trading strategies.
When the price crosses above the supertrend upper line, it can be seen as a potential buy signal, indicating a possible uptrend continuation. Conversely, when the price crosses below the supertrend lower line
TD Sequential
The invention of the famous technical analysis trader Tom Demark. Its core function is to find the reversal point of an asset. When the price reaches the trigger condition for 9 consecutive bars in the process of rising or falling, as a rule, the trend is considered to be exhausted, and a reversal or correction is highly likely.
If a bar is closed higher than the close of a bar 4 periods ago, then this bar satisfies the first condition. And similarly, with the second bar: if it closed above the close of a bar 4 periods ago, condition 2 is also satisfied. And the same with the remaining 7 bars. When 9 consecutive bars closed higher than the bars 4 periods earlier, the indicator shows the trend exhaustion and a potential reversal.
TWAP
Time-weighted average price. It is a trading indicator based on weighted average price, which shows the average price of an asset during a specific period without considering the volume of trades, unlike VWAP.
William fractals
Williams Fractal is a reversal candlestick pattern used to identify potential trend reversal points.
A fractal is a sequence of five complete candlesticks. It may be either bullish (down) or bearish (up).
It can be used as:
- Stop loss
- Reversal points
Using the fractal indicator is the recognition of a pattern in the price action of a traded security. Once the pattern is recognized, trader can then buy or sell, depending on whether the fractal indicator is bullish or bearish, looking to profit from a market reversal.
Special features
Master/Slave (trades copier)
Master/Slave - How to copy trades to multiple accounts
Master-Slave function allows opening positions on multiple accounts with one click.
When closing a position, consider that the "Trade Out All" button does not work for Master/Slave account. Use "Trade out "to close the positions on slave accounts.
Full video instruction is available by the link above.
POC lines configuration
How to make POC analysis in Volfix
POC - point of control - price with maximal volume for selected time interval.
To display POC level, activate “MV Only” (max volume only) function and Ray.
“Levels” allows showing the first few highest volume prices.
POC ray label font can be configured in Setup-Settings-Miscellaneous-H.Hist ray label font
How to set up daily POC levels
To set up Daily POCs activate Timeframe 2.
Then, go to Setup-Studies-TF2 settings. Disable “Show profile”, “Show summary”, “Show TPO”.
Then, activate “Max volume”, “Max volume ray”, “Max volume ray name”. Specify the number of days to display.
Trading DOM
Trading DOM, Order book analysis and trading
Trading DOM can be opened in market watch-component-trading DOM.
Top Button Panel
Add bracket - a function to add Stop loss and Take profit to opened position.
Center - centers the chart relative to the current price.
Lock Trade - blocks new position opening as well as placing and canceling orders.
Auto Center - automatically centers the chart relative to the current price.
Columns:
Columns can be removed/added in Setup-Change columns
Profit / Loss - potential profit or loss at each price level.
Orders - displays active orders.
“Today” - volume histogram for the current trading session.
Last Trade - the number of trades accumulated over the last 2 and a half seconds. This time is configured in the settings.
Sell/Last Buy - the same as Last Trade, but Sells and Buys are displayed separately. User can clear the Last Trade, Last Sell/Buy columns by double-clicking on the column name.
Flow Sell/Flow Buy - accumulated volume of contracts, traded only by the market orders. Volume trades at a particular price accumulate until the price breaks through this level.
DoM Delta - shows the number of pulling and stacking orders for each price
Last Day/Week/Contract - volume histograms of the last day, current week, and current contract.
Delta - the histogram of delta for the current trading session
Trades - the histogram of the number of traders in the current trading session.
Label - option to set price levels.
Workspace
Snapshots, Independent mode
Snapshots | How to use chart templates
Snapshot is a chart template with fixed settings, lines, and limits. A snapshot is needed for only one purpose: if there is a need to open several charts with the same symbol and timeframe but with different sets of lines and limits.
In a standard chart, limits and lines are saved automatically when you close the platform. However, the changes we made to the snapshot chart are not automatically saved. After making the changes, we resave the snapshot - Setup-Save Snapshot (or market watch-layout-save all snapshots). Then, this chart template can be uploaded in any window - Setup-Load snapshot.
Since the chart is switched to “Snapshot”, any lines, drawings, limits you set in this chart will not be copied to other charts with the same symbol.
To put the window out of the “snapshot”, go to Setup and turn off “Independent Mode”.
Independent mode - makes the window completely independent of changes in other windows with the same symbol. Changes applied to an independent window (lines, limits, settings…) will not affect other windows with the same symbol and will not be saved automatically after closing the platform.
After putting the window out of independent mode, all the settings that have been changed will be reset.
Layouts. How to save workspace
How to save settings. Workspaces creating. Layout/Desktop functions
All the layouts with charts and settings are stored on our servers, and you can access them from any PC.
Lines and Limits are saved automatically after the platform is closed (exception: if a window is in “Snapshot”) see “Snapshots, Independent mode”.
All other settings, like chart's colors, settings, and studies are saved in Layout (Market watch-layout-save layout). Layout also saves opened windows and their position on the screen.
If you want a layout with all the settings to be saved automatically after closing the platform, you can activate the corresponding option in Market watch-setup-global settings
Desktops configuration
Desktop function - an analog of Windows or macOS virtual desktops. It allows switching between different window sets.
Desktop creation algorithm:
- Minimize all windows except those you want to keep on the monitor.
- Position the required windows on the monitor.
- Click Alt+D -> New - enter desktop name -> Enter + Apply.
- Resave Layout: market watch -> Layout -> "Save".
Market replay
Market Replay - tool for futures and stocks backtesting
Market simulator allows testing up to 5 instruments simultaneously with numerous charts and market depth. There is an option to adjust the data flow speed and fast-forward.
Full video instruction is available by the link above.
Windows linking
Linking | Setting up window linking in VolFix
To link watch list to the needed windows, activate “Link” button in market watch window and select needed windows from the dropdown list.
Users can create numerous watch lists and link them to needed windows (market watch-component-statistics-market watch).
Statistics modules
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