Markets are having large swings and faster down days. Watching for opportunities, being able to lock in a $50 profit from using $300 for 2.5 months of time invested which averages to a 6% per month return. Using scale, even only $50 profit means 6% per month when most people may only make 5-8% per year in savings or retirement accounts. Annual return would be a nominal 72%, but compounded throughout the year results in 101%.