Rounding down Position Sizing

I am using FXSOL to position size with micro lots(1000 increments). Lets say I use 1% position sizing and I know you always round down the lots.

My question is has anybody figured out how much of a difference in return or some other figure, there will be by rounding down as opposed to position sizing a constant 1% on every trade not rounding down, which can be done with EFX GROUP(they allow any size lot numbers with I believe a 1000 being the smallest you can do.

Thanx,
Steve

There is no trading "rule" that says you must round down. It is also highly unlikely that 1% is the appropriate amount to risk on each trade. If you lack the confidence to risk the correct amount you should be backtesting and/or demo trading.

It's called granularity and it adds up over the long run.

Let's say you want to risk 1% and it comes out to $114,000 on the Eur. You round down to $100,000. That's 12% less than you wanted to risk. So your MM system of using a percentage based approach isn't working exactly like it should.

Regardless of whether you should use 1% per trade or not, if you use a percentage based MM system, then unless you can get it down exactly to the dollar like you can with some brokers, then you have to be satisfied with rounding.

You can run tests of this with Excel and you'll quickly see how much it adds up.