It appears you have not looked at any post except this one. The charts in this post do not expand because they are copied from my X post. Unless, Medium only expands for me, go down the list to some other day trading post and click the charts up. If those don't expand please let me know.
As for the open, it never ceases to amaze me how many people can get that. You say you're an experience share trader. Okay, the market opens and the stock you want to trade opens with it. That first price on the stock is the open, right?
It is the same with all of the option strikes. That first price is the open for the options. Simple as that. Now is the price of the option above that first price for the call or the put in whatever time frame you like, one minute in, six minutes in, sometime later in the day.? That is the buy signal.
I hear good things about Trading View but are you telling me Trading View can't show you all this to you on a chart?