Intra-day trading is certainly for professionals. It takes a lot of commitment but it is very possible for you to earn a great living. But it is just as easy to lose it all.
It requires a lot of time in front of the computer.
Basically if you want to day trade - in and out of a trade on the same day - well you have to be dependent on technical as well as any news that the market is awaiting or is absorbing. and for private investors this up to date news is hard to obtain.
Technical charting day charts - make sure you have all the indicators in your system present as well as all the time scales that only cover the day: ticks. 1 minute, 2 minute, 5 minute, 1/2 hour, 1 hour.
Not all indicators work in this short term environment.