Can i exchange money without paying any fees?

Hey i notice exchanging money between Canada and USA would be a good opportunity for my self to make some money. I notice the rates are moving from 1 CAD is 0.97 USD then the next day is 1 CAD is 0.98 USD. I would like to exchange 14,000 back and forth and make about 150 each time. Now all the banks i called charge a fee on top of the exchange rate. Wondering are they any way i can pay a flat rate and follow the bank of canada s rate?