I don't see it a loss if the market is down but if you sell it while the market is down, it is considered as a loss already.
With that kind of style you will not gonna last in the game, you only sell when you make profit and buy when there is a panic.
Doing things I mentioned all the time will surely bring your good profit for a trader, I know it's not easy to determine the timing but with proper practice and continues education that would be possible.