My approach FWIW is to wait till the DDT'S , BPO'S , BLT'S, ADO'S etc bottom out , then buy a smallish parcel that i am comfortable to bottom drawer till the next massive spike, whenever that may be.If it doesn't occur, no dramas its only a smallish parcel.
I buy a lot more as the big moves really start, whenever that is.
good luck Askier.