Hi. First, a great indicator. Thank you for sharing it.

How can I solve the following problem?

Example: I'm using H1, M30, M15, M5, M1.

If I draw a line in H1, it will be transferred to all subordinate charts and TFs. That is correct.

But, when I draw a line in M15, it is also drawn in M5 and in M1, but it shouldn't be drawn in M30 and in H1.

So too many small lines collect in M30 and H1 and you no longer have a good view in the higher-level chart TFs.

I tried to create a group with several synch indicators like in the following example. But if I place more like one synch indicator on a chart, then the cTrader freezes and crashes.
H1 = a
M30 = a, b
M15 = a, b, c
M5 = a, b, c, d
M1 = a, b, c, d, e

Looking forward to your answers.

Unfortunately I couldn't insert any screenshots here. Please take a look at my assignment on upwork. The screenshots are visible in this.