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It's nice that markdown links to related videos in the description seems to work. Rate of change calculations are the sort of thing where how you choose to do that calculation can greatly impact usability of the feature. Most programs do a horrible job at it and I don't understand why they don't take advantage of the fact that Typica is released under the MIT license and just steal/adapt my implementation.
https://video.typica.us/videos/watch/8459de3b-2592-4040-8a9f-68df5af397cb
Since doing this video I've made some changes that make this workable even with pretty awful quality hardware and even better with low noise/high resolution data acquisition devices.