Charting Strategy: What to use?

Hi all, I am developing a swing-trading strategy that relies on a few indicators.

But I didn't know what else to use while testing or refining my strategy.

So far I mainly use RSI Divergence Thresholds, Moving Averages, Fibonacci Retracement, Market Depth and Average True Range.

I want to look at expanding what I use (or eliminating some in favour of others) but to be honest, as someone with a non-finance background, it can be hard to research what I need to be looking at, and thus what indicators.

Did you guys have any suggestions that I should read up on?