This ProBuilder code snippet is designed to detect if a trade has been opened and closed within the same bar in a trading strategy. This can be useful for analyzing the performance of trading strategies that execute rapidly.

ONCE MyProfit = 0
TradeTriggered = 0

IF Not OnMarket THEN
    IF MyProfit <> STRATEGYPROFIT THEN
        TradeTriggered = 1
        MyProfit = STRATEGYPROFIT
    ENDIF
ENDIF

Explanation of the code:

• Initialization: The variables MyProfit and TradeTriggered are initialized. MyProfit is set to 0 to store the profit from the last trade, and TradeTriggered is set to 0 to indicate whether a trade was triggered.
• Checking market status: The IF Not OnMarket condition checks if there are currently no open trades.
• Detecting trade execution: Within the Not OnMarket block, another condition checks if MyProfit is different from STRATEGYPROFIT. STRATEGYPROFIT is a built-in variable that holds the current strategy profit.
• Updating variables: If MyProfit is different from STRATEGYPROFIT, it indicates that a trade was closed in the last bar, setting TradeTriggered to 1 and updating MyProfit to the latest STRATEGYPROFIT value.

This approach helps in identifying quick trades that open and close within a single price bar, which might be critical for strategies involving high-frequency trading or specific market conditions.