This code snippet demonstrates how to implement an adaptive money management system in trading strategies using the ProBuilder language. The system adjusts the position size based on the performance of the strategy, switching between different money management types based on profit and drawdown thresholds.

Once MoneyManagement = MM1stType
Equity = Capital + StrategyProfit
maxequity = max(equity,maxequity)
if equity < maxequity * (1 - (DrawdownNeededToSwitch/100)) then
    enoughtrades = 0
    tradecount = 0
    moneymanagement = MM1stType
endif
if equity < maxequity * (1 - (DrawdownNeededToQuit/100)) then
    quit
endif
if not EnoughTrades then
    if abs(countofposition) > abs(countofposition[1]) then
        tradecount = tradecount + 1
    endif
    if tradecount > TradesQtyForSwitch and maxequity >= Capital * (1 + (ProfitNeededForSwitch/100)) then
        EnoughTrades = 1
        MoneyManagement = MM2ndType
    endif
endif
IF MoneyManagement = 1 THEN
    PositionSize = Max(MinSize, Equity * (MinSize/Capital))
ENDIF
IF MoneyManagement = 2 THEN
    PositionSize = Max(LastSize, Equity * (MinSize/Capital))
    LastSize = PositionSize
ENDIF
IF MoneyManagement <> 1 and MoneyManagement <> 2 THEN
    PositionSize = MinSize
ENDIF
PositionSize = Round(PositionSize*100)
PositionSize = PositionSize/100

The code snippet above is structured to manage trading position sizes based on the performance of the trading strategy. Here’s a step-by-step explanation:

• Initialization: Sets the initial money management type and calculates the current equity.
• Maximum Equity Tracking: Keeps track of the highest equity level reached during the trading period.
• Drawdown Check: If the equity falls below a certain percentage from the maximum equity, it resets the trade count and switches back to the initial money management type.
• Strategy Termination: Stops the strategy if the equity falls below a specified maximum drawdown level.
• Trade Counting: Counts the number of new positions opened to determine if enough trades have been made to consider switching the money management type again.
• Money Management Switch: If the conditions of trade count and profit percentage are met, switches to a different money management type.
• Position Size Calculation: Depending on the active money management type, the position size is adjusted either based on the equity or it keeps increasing without decreasing.
• Rounding: The position size is rounded for practical implementation in trading orders.

This adaptive approach helps in optimizing the investment size based on the strategy’s performance, potentially leading to better risk management and capital utilization.