Apologies if this comes up a lot (as I'm sure it does) but when / how often do you feel is the best time to buy a dip?

I know its not an exact science but I've heard a few different preferences on this such as:

- Whenever the price decreases x% on the weekly
- Whenever the price moves below the weekly negative average
- Whenever the price moves below the monthly negative average
- Only a couple of times a year after a major correction + dead cat bounce
- Just look at the chart and go on your experience / gut