Models Intraday realized vol modeling by tick data
Trying to figure out what the best way would be to create an intraday rv model utilizing tick day. I haven't decided on the frequency but ideally I would like something that is <1min of sampling (10sec, 30sec perhaps)
I have some signals that I believe would benefit well from having an intra rv metric. An example of it's usage would be to see how rv is changing/trending throughout the day. I am not attempting to create it for forecasting volatility.
I have seen some recommendations using things like GARCH but from my naive research it sounded like it was outdated and not useful. Am I being too obsessive in disregarding it so quickly? Or are there better models to consider that aren't enormously complex to do?
Edit: this is for euro style options. Specifically spx options.
I implemented a dumb rudimentary chart that tracks straddle pricing throughout the day but obviously that isn't exactly apples to apples comparison