Quote from 168:
oanda's rate is the best i have found so far, i get $1.05 everyday for my 10k account .
That works out to a 3.78% annual rate. That is better than IB for a 10K account. It is worse than IB for any account over 140K.
Note that IB doesn't support FX trading on the PRO platform for amounts under 25K. The reality is that accts with small capital are probably better off trading futures rather than spot markets (at least with IB).