I have found that such simple crossover can show good results. Basically it has only 2 TEMA and nothing more. I don't know what else to write here. The code is simplest and has only one filter, which take into consideration the direction of chart.

In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.