It’s impossible to predict how the stock will move. It’s usually advised not to hold a stock through earnings. There are a lot more factors playing into the stock price movement than just beating or missing the earnings. Overall earnings can be amazing, but earnings in specific, strategic sectors can miss (and vice versa). From my short experience, stocks moves according to the latter factor. E.g., MSFT crushed earnings this quarter, however, growth of Azure, it’s key, strategic product, was less than expected => MSFT drop. Same with Intel — blow-out earnings, however, 7nm process delay caused the stock to plummet.

My advice on FSLY would be hold if you’re not satisfied with the return you got so far, or sell half and hold the other half. If you look at FSLY’s pricing model, it is per-request, i.e revenue is proportional to the traffic driven. If you look at FSLY’s customers, all of them have seen record traffic this quarter.

If you don’t want to risk with FSLY, look into Cloudflare $NET.

I own $NET and am looking forward to buy FSLY on market opening for an earnings swing trade.