I also looked into doing precisely the reverse a few months ago, that led me down the course of opinion indiors that cabbiefx was referring to.

Retail traders love to pick tops and bottoms that's clear to see using Oanda's standing ratio analysis (shows the % of long vs short position). I see it a lot of times where a pair includes a bias for one side along with the chart reveals it trending in another direction.

Everything I like to search for is that type of a setup (prejudice in 1 direction) along with also a candlestick formation indior the reverse (continuation of the trend). I'd look to get out whenever the bias starts shing to neutral (45-55%).

Hope it helps.