It is not easy to automate the process of calculating changes in stock prices

I wanted to try to automate the process of calculating changes in stock prices for major liquid assets (oil, gold, indices, etc.) over a certain period of time with the bot posting directly into the channel, but it turned out that it was not so easy to do this due to the lack of services to provide their API for these purposes.

And parsing is not so simple, since the whole history of quotes is now implemented on specialized sites, mainly directly on the client (in the browser) in dynamics.

I'll have to use my pens to figure something out on this topic for now)

But such an operational summary on the machine, for example, for a week, would be a good option for evaluating all assets at once on one plate.