Don't daytrade at all, the bid/ask spread alone is like a vacuum cleaner that'll require grotesque returns (depeding on your trading volume) just to breakeven.
PLUS , more importantly, markets are so superefficient that often, shortterm price fluctuations are simply not predictable -> you can't forecast totally random events, in any area.
Saving up money when you can in a regular job and then have some cash on you side when the stockmarket experiences a big crash, may be / is imho much smarter.