I understood something about the problem...
The trailing stop starts from the open price and not the opposite bid/ask...
One example: in a BUY OPERATION the buying price is ASK but the Sell price is BID when the trailing stop starts it considers only the ASK price !
Is there a way to use the opposite referral price ?
In a BUY operation the referral price for trailing is BID
In a Sell operation the referral price for trailing is ASK
Maurizio.