回撤网格指标 (Retracement grid indicator)

I am wondering if somebody knows an indicator or can build one as shown on the below example.

level 20 Y times
level 19 X times
level 18 W times
level 17 T times
level 16 S times
level 15 R times
level 14 Q times
level 13 P times
level 12 O times
level 11 N times
level 10 M times
level 9 L times
level 8 K times
level 7 J times
level 6 H times
level 5 F times
level 4 E times
level 3 D times
level 2 C times
level 1 B times
level 0 A times

Inputs for the indicator:
value in pips (distance between levels)
x1 for step
y1 for reverse
period length (the period the indicator will check back)

ex 1:

value=50 pips
Price started at level 0 went up to level 1 or passed it but didnt reach level 2 (value of 50 pips or more but didnt pass 100 pips) and then price returned to level 0.
So the level 1 will show 1 times

ex 2:

Price started at level 0 went up to level 2 or passed it but didnt reach level 3 and then price returned to level 1. so the level 2 will show 1 times.

Every time the price returns the "value" in this example 50 will start counting from a new 0 level

The indicator will draw dots on the chart at each specific level with the number of the level beside it.

Alert when the price reaches the specified level in present time.