I usually buy at low and sell at high. My guess initially went wrong. I suffered some loss. I traded with less amount of coins. My loss is minimal. I learned it slowly and now I'm doing very lazy trades for minimal profit. Trading goes profitable for me now. I don't put much risk with money.
Buy low, sell high. That is the basics here. At first I really dont understand that too. But being here helps me more on how it circulates. You just need a better wallet site that dont sell at really high price even if the bitcoin is too low.