I like $Futu Holdings Ltd (FUTU.US)$ MooMoo app because it has red flag features such as:
1. Interpretation of Indicators
It shows me if a stock is overbought or not. If a stock is hyper-overbought, it will be a red flag for me.
2. Indicator Details
This shows me the details of the above indicator. For me, the more "tags" showing overbought means more red flags.
Hope $Futu Holdings Ltd (FUTU.US)$ MooMoo can come out with more such features in the coming app versions.

$K. WAH INT'L (00173.HK)$ Steady and boring