There are various effective strategies for trading the market, and success mostly is based on your understanding of any strategy of your choice.
What has been your most effective strategy or strategy in confluence with another for trading the market?
Before mentioning about best trading method, let's consider what you want to trade with?
It's important and I would like to trade Bitcoin, not altcoins. From my experience, I know that even if I made bad trading position with Bitcoin (and with Spot trading), I can hold my position for a long time and wait for profit. It's impossible with altcoins that can die anytime and lose a lot of price in a bear market such as 90% or 99%.
With Bitcoin, I would like to DCA trading for entries and exits. You know, DCA is good strategy for investment but you can apply it for trading too, if you want trade.