Hello Folks,
I am not an expert, but commissions are forever lost no matter what the price does.
However, I do not agree with irresponsible Forex Dealers advertising "no commission" "great to trade with us" bla bla bla...
I see spreads as taking the volatility out of the price swings in Forex. If your with a dealer with high spreads you will not see that highest high or lowest low that you might with a lower spread dealer..."Simply put", the higher spread dealer removes some of the trend...
If you scalping, narrower spreads would be most important in Forex.
Remember most Forex dealers forbid "picking". This is where you compare quotes from different places and try to "arb them in"...
For instance at Oanda they have a 1.5 pip spread n the EUR/USD. So if you buy one lot (100,000 units) thats $15.00(roughly calculated) a mini (10,000 units) is a buck and a half...
Hope this helps.
Michael B.
P.S. No PDT rule and Forex seems to trend more and cleaner (and you can leverage it up, if your a gambler)...But you gotta' find an honest Forex dealer/market maker, like IB or Oanda...