The number of positions that are currently open in the current strategy.
Notes
When referenced from entry-related formulas in a strategy that enters positions at the open or at the close, S.Positions will have been reduced by any exits that occurred at that same time, allowing it to effectively be used in your entry-related strategy formulas to may need to calculate the number of available "position slots".
Use Combined or Extern to obtain this value for all strategies or for a specific other strategy or StatsGroup.
