I thought I saw an indicator something like this many, many years ago, but I couldn’t find it anymore, so I too created my own version a few years back, which I started calling “dynamic support/resistance envelopes.” (Last week was the first time I'd seen the term again in years.)
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You *are* recreating the wheel, and while that is usually thought-of as a "bad thing" -- YOU will learn this stuff backwards and forwards -- AND learn it's not magic at all, just common sense and some stuttering MAs... GOOD ON YA.