I don't know about Jimmy, but there are a lot of people scamming public in forex.
Even if they are scamming you, the question becomes are you walking away with profits year over year with them. Lot of systems will have unprofitable periods, but over time they come out ahead.
Many people don't have staying power, but the only reason to trade forex is volatility. Everything else is too irrational. Forex trades in huge price bands. And you hope by:
1) Entering in the middle, you position turns to profit at one point or another.
2) By entering at outside edge of bands, the price reverts to mean of the band.
The bands themselves trend, so you can play a trend based system with it as long as you enter at the edge of a band, with a large stop loss.
Even with this, to minimize risk:
1) Enter only positions in the direction of the bands trend but at the retracement edge.
2) Enter a stop loss befitting the market, not your account size. If your account size wont let you enter a stop loss size befitting the market, then you shouldn't be trading that market.
Lot of the long term players who have had positions for months in certain pairs, only exit when the long term trend is giving indications of failure.