After testing and breaking the purple resistance. Btc is moving to retest the ATH resistence (purple). If it happens we confirm a bull signal. If btc don't break the resistence we can go back to the 6-5k zone where is the strogest support (green).
Buy in the blue zones. Wait until confirm the price inside those boxes. If breaks purple line and 16k resistence -> buy, we are going again to 20k.
If do not broke, wait until supports.