Mrodri,
We are all testing and searching for a way, a grail if you will. Truely this doesnt exist, but the constant search goes on. This is not a bad thing as the search and associated research broadens our knowledge and experience, but there is no way anyone can conclusively and finitely tell you what to do.
I also have an FXDD account. So far I have no complaints with them. However, if you go to Turbo's own website and check their forum, they have a whole column on brokers, also the ForexAutoPilotForum.com has a lot of useful information.
There have been many problems lately with certain brokers outright banning or discouraging the use of this
EA, and there was some concern about FXDD posted. I have not seen any problems, but I am aware and waiting.
FxPro has been recomended. Turbo's staff has spoken to them and they are extremelly willing to work with the Turbo and all its users. Further they are a fully licensed and regulated Euopean forex broker, something I wasnt previously aware existed, and many users claim that they have the best spread rates available. I am opening a demo account with them now, and will know more soon. FxPro, not Fx-Pro. I fell for that one!!
The LotRiskReductor assigns a percentage of your available free margin to a new trade. The percentage you are comfortable putting at risk is up to you. The final stop out on the scalper appears to be around 60 pips.
Many professional traders recomend risking no more than 1-2% of the account on any 1 trade. If we set the RiskReductor to 5, and the max stop out is 60 pips, then the risk is 3% per trade. To me this seems reasonable considering the results so far. However, the real telling point will be if it hits a string of losses, so consider what your willing and comfortable risking, and potentialy losing, not just from 1 individual loss, but from a string of losses.
Also consider the account its on. If the account itself is risk capital, then a higher risk amount might be acceptable.