Let's look at the results from Jan. 1, 1995, to June 30, 2006, of buying a stock that made a 10-day high (above its 200-day moving average) and exiting when it closes below its five-day moving average, versus buying a stock that made a 10-day low (also above its 200-day moving average) and exiting when it closes above its five-day moving average.
The types of strategies people could develop on Quantopian could include technical strategies, a classic example of which would be when a 50-day moving average crosses a 20-day moving average.