Actually quite good VSA presentation by tradeguider without that usual heavy marketing, it is pure teaching of the principles. I recommend watching this after you read Master The Markets (along with the Tradeguider Chart Reading Bootcamp and Chart Reading Mastery by Dr. Gary, both available here in the forum).
It is presented by Sebastian Manby (which they used to call "chart reading machine" or something like that), no Gavin trying to sell tradeguider.
Here
https://we.tl/t-eLqm5iUMB4
https://we.tl/t-Yk61zCORbE