Basically trading is risky, sometime i feel trading is more risky then gambling.
Both trading and gambling need a luck factor - but thats not just in these two but in every thing in life. What varies is the fact that trading does not necessarily mean that you are losing your money if the price goes down - prices will come up once again and then you would be in profit. You dont need to "lose" your assets immediately. But in gambling if you lose, you lose your asset.
So we should use our little capital even we know the rules of trading. But some traders who have earned a lot of from trading and have experience they could use their big capital in it and take a risk, Actually time is matter in our knowledge.
Both time and knowledge are important. Without knowledge about how the market psychology works and analysis you are dead as a stone. Without time you wont have the proper moment to buy/sell and thus make profit.