Have conveyed this item before:
had a customer, when I wuz in the Biz, who was a paying customer ($10,000) of W.D. Gann. Part of the tutorial was the trading of gaps in the soybeans.
He would buy 1 cent from the gap and risk 1 cent into the gap and it worked many times. Go Figure.
when it did not work, he became wary. and, watched for awhile.
of course, these days , you'd need to adjust for volatility and ranges. I guess.
Just passing this along as the client may be dead and I am 62 myself.
Gap trading is a science itself. It is well worth study in its own right.
icd