Can anyone give me some guidelines to coding fixed step trailing stop ?

StopL = StopLLevel*position size;

if condition1 then buy("Long") next bar position size contracts at pricepoint stop;

setstopposition;
setstoploss(StopL);

I am using MultiCharts64 Version 14.0 Release (Build 21978) and IB TWS 10..11 version I have composed a strategy and put it on paper trade. I have found that the stop loss order cannnot be executed. The actually picture is that , the price JUST PASS the stop loss price [i.e. I have a long position] ...