Are you asking is your sentence correct English? If so, here are my comments. We don't say 'the price of the dollar', rather, 'the value of the dollar'. Fluctuation can mean both up and down, while 'deep' means only down. So we would say 'wide fluctuation', meaning the range from the lowest to the highest value can be large. In summary, I would express your sentence as follows: In our country the value of the dollar fluctuates widely.