I have been around for awhile now, and watched other styles come in , here is a bit of observation….

1) Each trade style for a certain pair/timeframe can be profitable.
2) There are extremely complicated and easy styles.
3) Only a few are EA, and mostly those are not as effecient as desired. (management issues)…
After 3-4 years of trading, I do know that there is not 1 trade style that fits all pairs all needs…

So, what can we say, there are the following self evident items in the forex market.

Spreading of trading opportunities can make more profit than concetrating on 1 pair.

Spreading of the same style can lose greatly if your not informed of what times/pairs/styles to use.