How do I know, when it’s cheap to buy…

I don’t want to brag, I just want to tell you my story. For some period of time I have been doing DCA with those hourly purchases of 0,25€. When I started doing this, every hour I was collecting more that 800 SATS. As the price inevitably went up, amount of SATS was declining. Right now the amount of my purchases starts again with the digit “2”

I can’t tell, if I want the price to drop significantly, so I can be buy more, or I want buying less that 100sats with my 0,25€