For Market depth experts and technicians, or anybody...help, page-12

"Also, SDI has moved 13% in 2 days since I spotted the surplus anomaly."

I hate to be a pedant, but the lowest that the stock has trade over the past two days since your initial post was 48.5c. So even if you are adept enough to have jagged the absolute low on the way in (not much stock changed hands there, mind) and the precise high (53c) on the way out, then your gain - in that perfect world - which is 9%.

Still very good, without doubt, but not quite at the embellished figure you quote.

But who am I to talk?
I bought zero shares at 48.5c.