Vertical Spreads

I look for more expensive stocks with large, frequent price change trends lasting about a month or so (most easily seen on a line chart). when the Bid/Ask spread widens (e.g. -$0.10 -- +$8.00) I take that as a sign that a turnaround is near and will enter a limit price around 25-33% up from the Bid, GTC. When the order fills, I set a Sell Limit order about 40-60% of max profit GTC and wait for it to hit. Monthlys only, strikes about $10 wide.