There are SO many to choose from !!!

I got the MACD, RSI Moving Average, and the Stochastic....

I somewhat starting to learn how to read these chart, however,

- The stock in the attached picture, SPX; how would I guess which way it will turn?

- XYZ is on an upward trend for a week, how do I know it won't start going down as soon as I buy them (I know that no one can predict that, but I'm sure some of you pros have a "calculation" or "sign" that you use to make a decision)

- XYZ has $100 resistance, but how would I know that it is not gonna break though and $100 become the new support?

I know none of my questions can be answered in a short sentence, and there is no certainty in this stock market, however, I was wondering if you guys could give me a few pointers to help me make "better" decisions.

I started to watch tastytrade videos along with youtube, etrade videos. They are great but does not cover a whole lot.

Thanks guys !!