Can any one help and tell me what is going when you can buy rise or fall on BTC and where i can do this? You can set a time limit as well.
Thanks in anticipation of your help.
You can't predict when the price is going to rise or fall.
You can sell your bitcoin when you made a trade order for your desired price on a traditional exchange, you can opt for stop-loss to prevent you from huge loss.
Ask the questions which make sense! next time.