You can setup a PageRule (basically an exception) on any plan level and tell us to cache an entire page (including HTML) if you use the "cache everything" option. This is available at the free level also. With the paid level plans you get more PageRules, but at the free level you still get 3 PageRules.
With "cache everything" used correctly (to ensure you're not accidentally telling us to cache something like a login form CloudFlare can easily handle 98%+ of all requests for your high traffic pages.
With "cache everything" used correctly (to ensure you're not accidentally telling us to cache something like a login form CloudFlare can easily handle 98%+ of all requests for your high traffic pages.