Exit Long() followed by Position check

[:::grimReaper:::]

I'm using OnMarketData to enter trades and only want one entry per direction. Below is pseudo code on how I want to implement it.

Say I'm long and the condition to enter short is true. Could it be possible that ExitLong() doesn't exit my long "quick enough," and therefore Position.MarketPosition == MarketPosition.Flat evaluates to false?

Thanks

protected override void OnMarketData(MarketDataEventArgs e){

      if (condition to enter short) {

           ExitLong();
						
           if (Position.MarketPosition == MarketPosition.Flat){
              //enter short
            }
       }
}

[NinjaTrader_Bertrand]

Yes, think that could be the case :::grimReaper:::, if you tied your entry to only a specific Level 1 event - though fill for a market exit should be quick for a liquid instrument (but certainly depends on instrument and time traded).

[:::grimReaper:::]

Thanks Bertrand, good to know. In any case it's a simple fix:

protected override void OnMarketData(MarketDataEventArgs e){

      if (condition to enter short) {
						
           if (Position.MarketPosition == MarketPosition.Short){
              return;
           } else {
              ExitLong()
              //and enter short
            }
       }
}