Confused about position sizing for volatility in Asian markets, especially with Nifty/Sensex

I've been trying to get a handle on position sizing, particularly in markets like India's Nifty/Sensex where volatility can be quite a ride. I understand the basic concept of risking X% of my capital per trade, but when you have days with such wide swings, it feels like my initial stop-loss placement often gets triggered by normal noise, forcing me to use wider stops. This, in turn, means smaller position sizes for the same risk, and sometimes the trade then moves significantly in my favor after I've been stopped out. It's frustrating.

Am I overthinking this, or is there a common method people use to adjust their position sizing for the higher volatility unique to some Asian indices, beyond just ATR? How do you factor in those daily whipsaws without shrinking your potential upside too much?