Risk-Based Position Sizing Calculator for MT4/MT5
Info
The Risk-Based Position Sizing Calculator for MT4/MT5 is a Indicator for MetaTrader 5 that risk-based position sizing calculator is a chart indicator designed to help plan trade volume prior to trade execution. It features draggable Entry and Stop lines, calculates the distance between these lines, and displays a broker-compatible position size based on your selected account risk.
Usage
This tool is typically used for enhancing chart analysis and decision making.
Platform
This Indicator works exclusively on MetaTrader 5 (both build 600+ and newer versions).
Setup
Place the downloaded file in MQL5/Indicators folder via File ? Open Data Folder in MetaTrader 5.
How to Install and Use Risk-Based Position Sizing Calculator for MT4/MT5
1. Installation: Place your file in the MQL/Indicators folder via "Open Data Folder" and restart your terminal.
2. Loading: Find the indicator in the Navigator, drag it onto your chart, and configure the input parameters in the popup window.
3. Customization: Press Ctrl+I to open the indicator list, select your tool, and click "Properties" to change colors, levels, or visual styles.
4. Updating: Replace the old file in the Indicators folder with the new version and restart the platform to apply changes.
Frequently Asked Questions
Q: Why is my indicator not showing? A: Verify the file is in the MQL/Indicators folder, or try right-clicking the "Indicators" tree in the Navigator and clicking "Refresh."
Q: Do custom indicators slow down the platform? A: Too many complex indicators can impact performance; remove unused ones via the "Indicator List" (Ctrl+I).
Q: Can I use MT4 indicators on MT5? A: No, MQL4 and MQL5 are distinct languages; ensure the indicator is compiled specifically for your platform version.
What this tool does
Risk-Based Position Sizing Calculator is a chart indicator designed to help plan trade volume prior to trade execution.
Typical Use Case
This Indicator excels in automated trading and technical analysis on MetaTrader 5.
Compatible Platform & Setup
This Indicator works on MetaTrader 5. Place the file in the MQL5/Indicators folder and restart the terminal.
Description & Settings
Related: Prop Firm Risk Calculator: Position Sizing and Loss Limits - another powerful indicator for MetaTrader 5 traders.
Risk-Based Position Sizing Calculator is a chart indicator designed to help plan trade volume prior to trade execution. It features draggable Entry and Stop lines, calculates the distance between these lines, and displays a broker-compatible position size based on your selected account risk.Also recommended: Gold Position Size Calculator (XAUUSD) for MT5 - similar indicator with strong performance on MetaTrader 5.
This indicator does not open orders or manage existing positions.
Risk can be defined in several ways:
- Percentage of account balance
- Percentage of account equity
- Fixed amount in the account currency
The calculation incorporates the symbol's trade tick size and loss tick value. An optional configurable round-turn commission estimate can also be included.
The calculated raw volume is rounded down to comply with the broker's volume step. This ensures that rounding up does not result in exceeding the selected risk level.
The chart panel provides the following information:
- Planned direction (Buy or Sell)
- Entry, Stop, and calculated Target prices
- Stop distance in points
- Risk amount in account currency
- Estimated risk per lot
- Raw calculated volume
- Broker-normalized volume
- Configurable reward-to-risk ratio
- Validation status
Inputs
InpRiskMode: Selects the risk definition method (percentage of balance, percentage of equity, or fixed money risk).
InpRiskValue: Sets the specific percentage or fixed account-currency amount for risk.
InpInitialSLPoints: Determines the initial distance between the Entry and Stop lines in points.
InpRewardRisk: Sets the reward-to-risk ratio used for calculating the Target line.
InpCommissionLot: An optional input for the estimated round-turn commission per lot.
Additional inputs allow customization of line colors, panel color, chart corner, and panel position.
How to Use
1. Compile the RiskBasedPositionSizeCalculator.mq5 file in MetaEditor.
2. Place the compiled indicator file in the MQL5\Indicators directory.
3. Attach the indicator to your desired chart.
4. Drag the Entry and Stop lines to set your planned entry and stop-loss prices.
5. Review the normalized volume and validation status displayed on the chart panel.
The position size calculated by this tool is an estimate. Actual trade risk may vary due to factors such as slippage, market gaps, commissions, swaps, and the broker's execution process.
Last updated 2026.
You may also like: MSB Pro ALGO Position Risk Monitor for MT5 - excellent alternative for indicator users on MetaTrader 5.
Source Code
#property strict
#property indicator_chart_window
#property indicator_plots 0
#property version "1.01"
#property description "This code is educational. Feel free to use, modify and upgrade as you wish. Visit ROBOTFX.ORG for professional trading tools"
enum ENUM_CALCULATOR_RISK_MODE
{
RISK_PERCENT_BALANCE = 0,
RISK_PERCENT_EQUITY = 1,
RISK_FIXED_MONEY = 2.......
⚠ Limitations & Risk Warning
- This tool is provided for educational and testing purposes only.
- Past performance does not guarantee future results.
- Trading involves substantial risk of loss. Use on a demo account first.
- Results may vary depending on market conditions, broker, and settings.
- We recommend thorough backtesting and forward testing before using with real funds.