This is a research challenge if someone has the time and chooses to accept it.
A time back a seasoned trader suggested this to me. I have not tested it in depth but it does seem to be worthy of in depth investigation.
A blue chip share is in up-trend then goes ex-div. It drops of course. His theory suggests that it, fairly quickly, (week or 2) gets back up to the before the ex-div sp. This is well suited to a CFD trade as it is 2 or 3%. CBA is half way back in one week, TLS went Ex-div today. One to watch. The important point is that is must be in up-trend before Ex-div.
A personal observation is that the day before Ex-div (after up-trend) there seems to be some selling pressure. I do not understand this. Take profit before the Ex drop, why? This means you do not get the div and the franking credit if held outright, and then you have to pay tax on the trade profit! It does not add up to me.
It could be the go to buy the day before Ex-div, get the div,( no FC) and then the ride back up. cheers mower
