Idea by: Alex.

MQL5 code by: Vladimir Karputov.

The EA uses custom indicator ExVol:

Separate stop loss, take profit, and trailing are used for BUY and SELL positions.

Inputs

• Maximum Risk in percentage - lot size calculations, the maximum risk parameter;
• Descrease factor - lot size calculations; decrease it, if there are many losing trades;
• Stop Loss Buy - stop loss for BUY positions;
• Stop Loss Sell - stop loss for SELL positions;
• Take Profit Buy - take profit for BUY positions;
• Take Profit Sell - take profit for SELL positions;
• Trailing Stop Buy - trailing for BUY positions;
• Trailing Stop Sell - trailing for SELL positions;
• Trailing Step - trailing step (common for both BUY and SELL positions);
• ExVol: ExPeriod - parameter of custom indicator "ExVol";
• magic number - unique identifier for the EA.

Example of testing on EURUSD,M15: