It's not, It's not! It's just significantly harder than stocks and general investment schemes. A lot of people who call it a sham are just hateful. I've been there too... I lost! First $400 and then about $600.
But I went in a third time after a break to play a conservative hand. though, I put in just $200 but managed to turn it into a sweet 450. Didn't quite make up for the initial loss but it was still an important moment for me. It takes hard work, no doubt, and constant monitoring of the charts, right use of both kinds of indicators and all the works but you can make it, if you're persistent and intelligent about it.