I understand your question.. Heres the problem, its not as clear cut as you might like.. You can guestimate where the base is.. maybe its near the bottom of the wick, or maybe its closer to the body, but it depends on where the buyers came in.. in this chart it looks like it was nearer to the body, but not anymore.. You have to see it from the perspective of market reaction.. you need panic to buy in.. without panic, if you buy, you could be buying a grind lower.. thats why you want a large bounce, to show you strong buyers and to help you identify a base, and then, later when it cracks, you need to see a panic drop.. then you know your getting in at the right place.. so in the chart above, the bounces are starting to get smaller and smaller off that support and therefor disqualifies it as a base, because the coming crack is getting obvious to everyone..