Just curious since the last discussion I had was about gambling vs trading. I know trading can seem to be a bit of a gamble as well, but I see it a little bit like poker. It's a combination of math and psychology. Maybe not the same ratio though, just generalizing 
From my personal opinion the difference between trading and gambling is that trading should be a constant thing. which is same amount of lot size, risk and take profit level. No matter what instrument or gambling risk is always present, so trading is more to a money management reducing the risk as much as possible but no matter what there is no 0% risk who tells you 0% for trading is cheating you. Trading and gambling can be similar in a way that you will lose back what you win beforehand but trading give you the edge of preserving your capital if you do your money management well and not over stretching or over trading.