I will post my current market situation just as an example.
NQ is currently 1625. I sold NQ 1490 and 1510 puts a few weeks earlier when NQ was trading around 1580. Those are about 40% of the maximum size I would prefer to take because at the time I thought the market could probe lower. I actually wanted to go 20% of size but put premiums are higher thus reward was higher so I initiated 40%. As NQ climbed to 1620 earlier, I reduced back to 20% because I was uncomfortable with the higher 40% size, and could always reload if the situation warranted. It was a good closed profit though I forego some premium.
I shorted NQ 1660 calls this week at the same time when NQ was around NQ 1620. It was 20% of my desired maximum size and even that I considered high given the momentum is so surprisingly strong in this market and 40 points away is not much, but I already some puts to offset some risk.
During this time, I am thinking that the market is overextended and can see sharp brief pullbacks, but I tend to believe that momentum usually persists much longer than anyone can anticipate.
So, overall my account is sized around 20% because to me the market seems strong but complacent, and complacent to me equals risk.
I anticipate that there is a good chance I will be hedging this month as NQ may cross 1660. I will evaluate market behaviour at that point. Also, while my puts are far OTM, I monitor them by deciding whether what premium is left is worth holding depending on market action. Currently, I am holding them because the market is sticky to the upside and the large amount the market would have to drop for the puts to be ITM makes it a low probability at the moment.