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Question: I would like to know how to determine the upward/downward signal for each indicator.
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Answer:

PSA is a flexible and versatile strength indicator. It allows for data from multiple timeframes and periods to be weighted, and then the result for EACH PAIR, and CURRENCY, to be presented as a single, consolidated VALUE.

It uses linear regression models to rank both pairs and currencies, from the strongest trending down to the most sideways moving.

In other words, PSA determines trend strength by calculating a weighted average of the slopes of a number of (invisible) regression lines.

Since you have worked on the KU-chart indicator, PSA should also be easy to work on if you can take measures from the images attached.

I believe the PSA indicator is better than the CCFp and KU-chart indicators, (IMO).

The ALERT THRESHOLD if set to a higher figure (60,70,75 or more) Signals the CURRENCY PAIRS in that (60,70,75 or more) range.

The ALERT THRESHOLDccy settings depends on what individual trader wants from currency STRENGTH. From 250 (value) and above will signal CURRENCIES in and above that range. It works on both the WEAK and STRONG currencies.