Have another question for the knowledgable people here.

I've been having trouble knowing where to buy in sell in the middle of a dip. Here's a shot of ETH/USD with a dip in late June. On the 2 month view, i think i've hit the buy and sell points.

https://www.coinigy.com/s/i/597ff0dcd8f33/

but in the moment (zoomed in) are all of these (in purple) safe entry and exit points? In the moment it's harder for me to tell..

https://www.coinigy.com/s/i/597ff123f0b6d/

To that end, what is the current base on ETH, $180?
https://www.coinigy.com/s/i/597ff2076c2c3/

Thanks again!