I've been using this system martingale successfully, but I only use it at opening London (sometimes opening USA) and so far I'm doing it manually. By using proper money management and a stop loss to protect equity it is reasonably safe.
The point is, if we develop an EA, after testing different parameters, it might be possible to use it maybe during all London and USA sessions, who knows...
Martingale strategies are not for everybody, if you don't like it, you shouldn't even bother to read this post....(in the name of the tread you already can see that it is about martingale...)
Some folks at the TSD forum are quite happy using the "blessing" EA, which is also a martingale type strategy...
I just brought this idea to this forum to see if anybody is interested in finding out if there is a future for an EA based in a system that is ALREADY profitable manually, under certain circumstances...