Taking off half of my position deleted the entire trailing stop

[halgo_boulder]

Hello.... I have the following code that takes half my position off after a number of ticks in profit
The number of ticks is "IWantHalf"

The problem is... when I do that it deletes my trailing stop entirely instead of just modifying the quantity.

Do I need to re-establish a trail stop after selling half of my position?

Thank you.

if (IWantHalf > 10
&& Positions[1].MarketPosition != MarketPosition.Flat
&& Positions[1].Quantity > DefaultOrderQuantity
&& Positions[1].Quantity >= 2
)
{
if ( //down candle X above price
Closes[0][0] > Positions[1].AveragePrice - Convert.ToDouble(IWantHalf / TickSize)
&& Closes[0][0] < Opens[0][0]
)
{
Print("Price reached "
+ IWantHalf.ToString()
+ " above entry price of "
+ Positions[1].AveragePrice.ToString());
Print("Take off this many: " + Convert.ToInt32(Positions[1].Quantity/2).ToString());

ExitLong(1,Convert.ToInt32(Positions[1].Quantity/2), "","");
}
}

[NinjaTrader_BrandonH]

Hello halgo_boulder,

Thanks for your post.

It sounds like to are looking to scale out of a position in your strategy.

Scaling into a position is controlled with the signal names of your strategy, and properties EntryHandling and EntriesPerDirection. This reference sample can help with scaling in and out of a strategy.
https://ninjatrader.com/suppport/helpGuides/nt8/en-us/scaling_out_of_a_position.htm

This sample can assist further with managing multiple exit/entry signals:
https://ninjatrader.com/support/helpGuides/nt8/en-us/using_multiple_entry_exit_sign.htm