buying and selling – How one 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 prefer to promote some small % of those “conventional” investments and buy some cryptocurrency. However I’m attempting to determine the right way to calculate when is one of the best time to do that switch.

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

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

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

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