I want give you a link to a post by Springhill Jack. It is here. It has some terrific charts that might be worth your review.
Don't let the title of the site, HotOptionsBabe.com, fool you. Serious work goes on there. AnnaMall was a contributor to the Evil Speculator, and a frequent poster on Slope of Hope. Like a bar, you see many of the same faces. The chart work by many of the contributors is fantastic. It is beyond my skill. I'll point you in more directions.