[amibroker] from a stop switching in a trailing stop

["Vins" <mrpurple@xxxxxxxx>]

hi, 
this is a formula for a stop
ApplyStop(0,2,10,1,False));

here the trailing stop 
ApplyStop(2,2,6,1,False);

so now i'ld like to put the stop but if a condition is verified 
switchin in trailing stop

i wrote this 
trstopon= condition;
ApplyStop(IIf(trstopon==1,2,0),2,IIf(trstopon==1,6,10),1,False);

but i'm getting an error and cursor blinking after FALSE.
from the help of error:
"Error 4. Incorrect type of argument(s). Expecting number here.
This occurs in ApplyStop function when Type, Mode, ExitAtStop or 
Volatile parameter is an array"

thank You



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