An example of this would be if someone looks at SPY would they choose the low to be at March 9th, or March 20th. Answer is that it depends on how far back they look. Having historical patterns to allow one to see, save, and adjust could allow them to perfect their technical analysis skills.
It would seem that this 'difference' in location of technical analysis indicators might account for the edge that others have. I envision storing all the past indicators, and the person could scroll backwards in time to see their past indicators allowing them to refine their skills. I guess this could be done now by writing down and drawing the indicators on notebook paper for lookup later. I also see people, maybe those who are more successful, trading patterns with their friends in a social platform. For example, I might not use but would like to see the technical analysis patterns used by @nickfenton, and he could share (or sell) them with me if we were friends (similar to the facebook status of friends).