yes you are right, it all depends on the trading strategy and management of the money you use. obviously you must be aware that the use of lots in trading, will be related to how likely you are to lose. because it's better you use good money management, and it's not too big to use a lot. However, trading must have times when we will suffer losses. and lot size depends on your capital, how much capital you have and how much risk you are willing to take. but I think the more lot size the more tension. I think .10 makes sense when you really feel that the market will get you good