.. even though I agree that for an algorithmic rendition, it is going to be easier to pick one day of the month... rather than overly complicating matters or alternatively to be even more realistic in the incrementalism kind of approach, there could be a couple of dates chosen.. the 8th and the 22nd, for example.
How far to go back: You see that my hypothetical goes back to October 2022, but if you were to get the algorithm to punch in the dates, we might want to go back a bit further to show how the tool would have had worked over a longer period of time, maybe even a whole cycle.... .. so then once it is set up, then I suppose it would just update every month, like you mentioned.
I can add 2 withdrawal days, 8 and 22.
The algorithm start date can be a user input. Any date he like.
It will also use the other inputs (stash size and withdrawal rate).
Then it will show a simulation of how much btc(and usd value) would have been withdrawal, and how much is left. And a chart with that data.
I think it will look nice.
It would be nice to be able to go back, but if we are not able to find any kind of reliable data source for that, then at least having the current date would be better than nothing.
Ok, this is easy I will take a look into this and the shareable url