Astrogirl 

Now I'm trying to use a trailing stop instead a stop loss. I am using this code: else if (Position.MarketPosition == MarketPosition.Long && Median[0] == targetstep1) { SetTrailStop("", CalculationMode.Price, trailing1, false); } instead of: { SetStopLoss("", CalculationMode.Price, trailing1, false); } ("targetstep1" is a determineted target price level and "trailin1" is an integer variable of a stop price) It doesn't work... what's wrong with me?!

My assumption is that a trailing stop is not compatible with the stop loss already present in the strategy.

@Astrogirl
Again refer to NT help guide and you will see that:

Quoting 

Note: CalculationMode.Price is irrelevant for trail stops

Here is the direct link to this info:
NinjaTrader Version 7