I don't think you can blame the broker. I think you should blame yourself, because you had no idea what you were doing and what kind of risks you were taking. I think you were gambling, not trading. I think it was inevitable that your account would eventually be wiped out, no matter what the broker did. I think the broker's margin policies, and occasional changes to it, were calculated to protect the broker, and its other customers, from suffering losses caused by gamblers. If the broker had allowed gamblers to generate large losses they couldn't cover, and which the brokerage itself couldn't cover so that the broker went bankrupt, then the assets of its customers could have been tapped, in order to cover the deficit. A broker with strict risk control protects its trader customers from its gambler customers.