Here is an easy way to detect that there is a divergence and price will break soon. First, we add a RSI indicator to chart, then drag it from below onto the main chart where the candles are (overlay). To avoid blocking vision, you can open RSI's style and hide the background, make the line thicken. Now is how it works. Normally, you will notice RSI goes along...
Here shows another example of how to use the indicator to DCA. You see, like any indicators, it can't always 100% predict the future. Sometimes when you bought and price continues to go down. That's inevitable. Now you should consider some where to DCA. But where it might be? You are still in fear seeing red candles, what if you jump in and it continues go down...