Myst, concerning the double signal, why is there a problem? Is it because you adjust the amount to sell/buy after a buy/sell? If I would use X_DEV, I would enter good-for-the-day limit orders before market open, grab my golf clubs, and after market close I would have a look whether nil, one, or both orders had triggered. As long as both orders are unaffected by what happens intraday, where is the problem? OK, after a buy you might want to sell more and perhaps vice versa, but isn't that wanting too much?
Sorry if this has been answered already, but I couldn't find it in the massive history...
Regards,
Karel