First we should know that trading isn't gambling and isn't about luck if you wish to become a successful trader there are some qualities you should possess
I think many people will be against this statement that trading is not gambling. Trading is involves prediction without actually knowing the outcome and this is why most people don’t trust it and rather easily relate it to gambling. Personally I wouldn’t debate on that even if I think it is not but I tell people that even if it is gambling then it is a calculated gambling because the odds are in your favour if you do the right analysis unlike the other gambling
I have to agree with you that the portion of ones portfolio needed to trade with shouldn’t be that much because of the risk involve. But the percentages are what I don’t go with because I feel like everyone should have his own risk management plan and one shouldn’t be following others management plans. As a trade quenching the fire of greed is the best risk management strategy because it consumes one’s funds easily