Ideally there is a complete theory on this you have to enter on primarily when there is either a breakout, reversal or continuation of any major pattern, in this you take confluence with some indicator that you have in your arsenal and then prepare some pivot points for take profit and stop losses. This way you trade appropriately finding the correct points of trading.
But this does not still mean trading is easy, the theoretical part can be easy but to make profit often may not be easy. You are right that using trading indicators is very important, I started to use Bollinger Band and Relative Strength Index and I make some profit, but my take profit is not that of a long range and I am cool with just the little profit I make. Some traders do not make use of trading indicators but just trade like they are gambling which makes them more vulnerable to losses.
Trading is never been easy and i dont really believe into those people who do really claim out that trading is easy and going back into someone personal status of their trading activities then
it doesnt matter if you do earn less or big because the one thing you should do mind off on how you would gonna sustain your trading.
Doesnt matter on what are the ways or methods you would be using because this is the only thing that what matter most which is related to this.
Knowing on the perfect buy or sell time is impossible because this market is really that unpredictable which means that it cant be possible.