I'd like to create a dynamic grid system and maybe someone can give me a starting point.

The grid should be created out of points that happened in the past, e.g. SMA10 cross SMA50 (really bad example, I got better things with more validity), the cross is the horizontal level to remember.
Later on, the levels if crossed by price with a certain condition, e.g. Momentum > x should trigger a trade.

Any help how to get started on something like that would be really nice.

Question is, how to remember the levels?
Any level crossed should loose validity, oldest to newer.

Would anyone here be interested to develop such a system together?