Quantitative Scalping Trader (QST) – User Guide and Detailed Configuration
Trading Systems

Quantitative Scalping Trader (QST) – User Guide and Detailed Configuration

24 September 2025, 22:24
Titouan Sebastien Julien Cadoux
Titouan Sebastien Julien Cadoux
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The QST EA is a multi-symbol Expert Advisor designed to detect optimal market entry and exit points. It uses a set of technical indicators: RSI, double EMA, and MACD, and integrates advanced Stop Loss, Trailing Stop, and Breakeven management to secure positions and optimize profits.

Main Features

Multi-symbol
The EA can trade EURUSD, GBPUSD, and USDJPY simultaneously (configurable). Each symbol has a unique Magic Number and specific Stop Loss / Trailing Stop settings.

Indicators Used

RSI – Relative Strength Index

  • RSIPeriod: defines the RSI calculation period (default 15).

  • Use5050RSI: switches between two threshold styles:

    • 30/70 (classic): BUY if RSI > 70, SELL if RSI < 30.

    • 50/50: open a trade when RSI crosses the 50 midline.

⚠️ These thresholds determine exactly when the EA validates an entry condition. Changing these values directly affects the number and timing of trades.

EMA and MACD

  • Fast EMA / Slow EMA: detect the overall trend. Positions are only taken if the trend is confirmed (e.g., Fast EMA > Slow EMA for BUY).

  • MACD: acts as a filter to avoid false signals.

Wait for New Candle

  • WaitForNewBar:

    • true : trade only at the close of a candle.

    • false : trade on every tick, more reactive but more sensitive to market noise.

⚠️ This parameter fundamentally changes the EA’s behavior.

Trading Hours

  • EnableTradingHours, TradingStartHour, TradingEndHour: define the hours when the EA is allowed to open positions.

  • SkipLiquidMondayFriday: avoids opening trades during high volatility or low liquidity periods (Monday morning, Friday afternoon).

⚠️ Crucial to limit risk during extreme market movements.

Using % of Capital for Lot Size

  • UsePercentOfCapital: opens positions proportional to the available capital.

  • % of capital: percentage of capital to risk per trade.

  • Account leverage: enter the correct account leverage for accurate lot calculation.

⚠️ Lot size will be automatically calculated according to these parameters.

Note: in this code, the lot size is forced to 0.2, but this calculation is useful if you modify the code to enable % of capital.

Stop Loss and Trailing

  • SL configurable per symbol.

  • Trailing Start / Step: define when the SL starts following the market and by how many steps it moves.

  • Breakeven: can secure the position once a minimum profit is reached.

Risk Management

  • Limits the number of positions per symbol according to RiskLevel (Low / Medium / High).

  • Automatically checks available margin before opening a trade.

  • Respects broker volume limits.

For any questions or support, you can contact the author on MQL5.


Files:
QTS.set  4 kb