This is a custom ema cloud script with a 5/12 cloud and a 34/50 cloud.
Personally, I used to trade with the 20 ema and 50 ema, but wanted something with a little more robust. These clouds are especially great for the first hour of market open since strong bullish stocks that have gapped up overnight tend to follow these trends.
For example, Tesla opened above the clouds and used them as support before running all day.