my strategy now about my past experience from trading bitcoins is to check the price chart, you can predict if the bitcoin price will be high or low using price chart , you will see the changes of bitcoin price in their chart.
example 24high and 24low is:
545.000000usd - 24high
544.000000usd - 24low - the bitcoin price will be getting high.
but if its:
545.000000usd - 24high
530.000000usd - 24low - the price of bitcoins will be getting low.
check if the gap is very long it means the bitcoin will be in low price i hope you'll learn from my guide

I think this is a common method i am also doing this method but for now it will not work because of price is increasingly fast but you dont know if the price wil go down or it will continue the price high..