Lowest point will only be known when it is too late.
You never know you have bought the lowest point, until it bounced back up and never return to the lowest point.
So how to catch the lowest point on going?
You never know.
It is pure luck to catch the lowest point.
If look at history long term chart, if a stock drops from 10 to 5, and goes back up to 8, whether you have bought at 5.00 or 5.20 or 5.80 or even 6, it doesn't matter much, all are making decent gain.
If you keep on looking for lowest point, even when it touched 5 time, you still think it will go lower, so no buy keep on waiting for "lowest".
The stock bounced back up to 5.50.
5.50 is not lowest, no buy.
Then wait again, but it never goes back 5.00.
So, you have zero stock, and the stock goes back up to 8.
While the person earlier who bought 5.00, 5.20, 5.80 or 6, makes decent profit.