Trading strategy is very important

The most people are looking how to trade (Wich indicator. support & resistance, study candle sticks), but the most important thing is a Strategy before to look how to trade.

Try to treat Forex like a problem and with math try to solve this problem. It must be possible to close every day with a profit. If you have a good strategy, then the next step is to look wich indicator or support & resistance line will help to execute the strategy.

and then what you mean by "strategy"? please describe it

With strategy i mean: Try first without indicators etcc.. to figure out looking to the chart how to go LONG or SHORT everytime to make money. Try first to come with a solution for this (You will need a good understand for math). I believe that to become a good traders you must be good at math.
And the second step is loop how to use indicators etc... to when to go in and when to go out to make the strategy better.

how long your experience in this forex?

7 year experience

I completely agree with you that you need an overall mathematical strategy in order to succeed. Focusing on perfect entries and exits is to get mired in the details. Its also likely not possible to be profitable every day, but perhaps is best to focus on overall gains through time. But yes, an overarching strategy for systemically plucking money from the markets is where to start, NOT focusing on candle patterns or indicators or pivots or in any way trying to figure out what exactly the market will do next.