I require the system tester with optimisation for this below stop loss indicator.

 

Trailing stop loss formula=

perc:=Input("Trailing Loss % :",0,100,14);
loss:=C*perc/100;
trail:= 
If(C>PREV AND Ref(C,-1)>PREV,
Max(PREV,C-loss),
If(C<PREV AND Ref(C,-1)<PREV,
Min(PREV,C+loss),
If(C>PREV,C-loss,C+loss)));
Trail

The PREV heavy code can be replaced by... perc:=Input("Trailing Loss % :",0,100,14); ExtFml("MSTT.TS2",C,C/100,perc); However, I'd caution anyone using high percentage values with the MSTT DLL TS2 function that it can return N/A until the point at which the PREV-based result would cross the price being trailed. This is not a serious issue with say a 10% trail, but higher percentages would generally need more data to be loaded for the DLL-based version to generate a valid result across the target date range. Since execution of the DLL-based version is probably around 50 times faster than the PREV version, then loading 2000 data bars (in system test for example) should still run about 25 times faster than 1000 data bars loaded for the PREV code, as tested with an exploration across the S&P 500. Roy