This ProBuilder code snippet is designed to determine the direction and profitability of the last trade executed in a trading strategy. It checks whether the last trade was profitable and identifies if it was a buy or sell order based on the closing price and the trade price.

//------------------
//check profit
if strategyprofit<>strategyprofit[1] then
  if positionperf(1)>0 then
    if closetradeprice(2) then
      gain=1 //was buy
    endif
  else
    gain=0
  endif
endif

Here is a step-by-step explanation of the code:

• Line 3: Checks if the current strategy profit is different from the previous bar’s strategy profit. This condition helps to determine if a trade was closed in the last bar.
• Line 4: If a trade was closed, it then checks if the last closed position was profitable using positionperf(1), which returns the performance of the last closed position.
• Line 5-9: Determines the direction of the trade:
  • Line 6: If the closing price is less than the trade price two bars ago (tradeprice(2)), it sets gain to -1, indicating a sell order was closed.
  • Line 7-8: Conversely, if the closing price is greater than the trade price from two bars ago, it sets gain to 1, indicating a buy order was closed.
• Line 10: If the last position was not profitable, it sets gain to 0, indicating no gain or loss from the last trade direction.

This snippet is useful for traders and developers who are analyzing the behavior of their automated trading strategies, particularly in understanding the outcomes of their recent trades.