buying and selling – How you can monitor the optimum time to promote shares and purchase cryptocurrency?

I’ve a bunch of shares and mutual funds in my portfolio. I might wish to promote some small % of those “conventional” investments and buy some cryptocurrency. However I’m making an attempt to determine learn how to calculate when is the very best time to do that switch.

Mainly, what I would like is to see some chart and setup an alert that tells me:

1. When the inventory worth is excessive (relative to my fiat forex) and
2. When the value of the cryptocurrency is low (relative to the above fiat forex)

First, how do I do that theoretically? Is there some solution to assemble a chart that simplifies two traces into one line, which is a few calculation of the 2 traces that reveals a single line with factors very excessive on the y-axis when the above two situations are true, and really low on the y-axis when the above situations aren’t true?

Second, how can I setup an alert that tells me when the chart above is at some kind of year-time-high, so I will be alerted that “now” is an efficient time to promote shares and purchase the given cryptocurrency.