That is a big problem. When the exchange rate goes up my sales definitely increase. Right now the major slump seems to be due to the exchange rate.
Would it make sense to have sales when the value of the coin falls? You'll get to pick up more at the cheaper rate than most shops will. Eventually the expectation of sales when the value drops will keep people from worrying about the drops as much too.
not sure i get what your saying,
if the price goes up then their is more incentive to buy because your btc have more buying power.
Right, when the value/price of Bitcoin goes up they have lots of reason to buy (they are richer,more bang for 1 coin, etc) when the value/price of Bitcoin goes down, maybe offer a small discount so that you still get sales, otherwise you will tend to accumulate coins at their high price more often than their low price.