wow! simply not true. bottom's come in many forms. I see a bounce of the 52 week low and then it heads lower again. I never try to catch bottom anymore and it is not too late when you think a stock bottomed. 15% above bottom is a good entry point IMO. I'm in at 17 and will wait until 16 to add... or whatever 15% of the next low is... depending on which comes first.
That is the beauty of this from an investor perspective. I'm in with less than 1k shares and will add at every dollar dip. Eventually an $80 stock. Gotta love IRA accounts that you don't stress over daily drops and you know it will pay big in the end!!