Yeah, I was wrong...Partly. The first post was correct (they may not be common, but it is correct) on when an option can be exercise and time period. The post is correct on why they (hedge funds/mutual funds/investors) exercise options early. People should know about being uncovered (naked)...If they don't, they should...Common sense (except if you are at Robinhood trying to exercise your options on Gamestop)!! The third one was correct also...Options can be exercised at anytime (no matter the stock price). They won't be, because of no profit involved.
Here is where I was wrong. I went down a rabbit hole when we got sidetracked with things like exercising. I also didn't read closely the second part of the question. I'll try and give a congruent answer...accept it or not.
"Just wondering if others see this often and am interested in knowing if anyone uses these as signals to go in the opposite direction."
The first part...Yes, many options get exercise early. The second part...By owning a covered call bye itself, you are admitting you are not doing a straddle of any kind. By just selling the covered call (sell to open)...Without holding another option position in the stock, there are only a few ways to profit from the transaction. The problem is the option can be exercised at anytime (including after hours).
Buy a put at 20% below the current high price...But it carries potential losses with it.
Or, as the stock rises...Just buy back your option, if you feel it will make a bigger run (buy to close)...You keep the dividend and you keep the future profit you hope to gain.
Both of the above can turn out bad. I have done covered calls for over 25 years. I look for/between a 6%-30% annual return on my money...Most average around 10%. I will let others profit greatly from my covered calls. But, I also enjoy my stocks (covered calls) rising and not getting called away...Expiring out of the money. I just laugh, then write another covered call if I choose to...
PS...One last though, are you selling your calls to cheaply?? Should you consider way out the money calls...Even leaps that are way out of the money?? I have changed my investing strategy on how I write them. I am doing more of the above...Dividend producing companies (think Coke KO, ADM), with leaps, way out of the money.
PSS...You might also want to read this. I've done it before with covered calls (think Exxon). It has worked out OK for me.
https://www.investopedia.com/terms/d/diagonalspread.asp