Before doing a Clear Cache Magento, I got about 3-4 sells per day, after doing a Clear Cache Magento, the sells gone to ZERO.
What's going on?
This is not the first time that I got this issue with Magento (220.127.116.11).
In Magento 18.104.22.168, clearing the cache is something that you should do when you need to see changes that you made to the back end of the system (such as pricing updates, CMS content changes, new images, etc) and allow them to show up on the front end of the site.
Without actually seeing the site, two things could be happening when you clear the cache: 1. Your site could be a lot slower, as it's trying to now rebuild the cache and this can take time. If this is a full page cache extension, like Amasty FPC, then a site visitor has to visit that page for it to be created in the cached folder.
It also could be a seasonal change, or a change in your search rankings. One more thing to check: make sure that your site is okay to be indexed by search engines. This is a tag on the home page and other pages of the site (index, follow) as well as also specified in the robots.txt file on your site root.
I hope this helps.