One of the most common questions I get from aspiring day traders: How do you know which stocks that gap up will follow through, and which stocks will fade off all day? We talked earlier this week about stock gaps and how to scan for gappers. Today we will discuss the main technical factors that affect whether a stock follows through on a gap-up or not. There are 5 main factors that affect whether a gap-up will be sold into or bought up. You will want to have all 5 of these align to have a high probability of getting on the right side of a trend on a gapper: