I have read and heard that one can earn and make good money with trading bitcoins.I also want to give it a shot.Everyone says the basic rule of trading is buy low and sell high but I am confused because which ever exchange I try,the buy rate is always higher than sell rate.How can one profit if sell rate is less than buy rate.If I buy at $390, the sell rate is $380
this is happen on almost every exchange,the only way to get profit and pay some margin is you must trade with large amount,i know its not easy,but you must try to collect bitcoin as much as you can,and trade it on good exchange.