It selects the min/max price for btc/usd from a set of exchanges and shows them on the chart. It is possible to add or remove exchanges by editing the source code
I've been working on a top and bottom picker script over the past couple of weeks, based on RSI of multiple timeframe closing price. It've been a pretty good trading system that's tested over the last meteoric rise from 220~270 and back down to 230 right now, and I think it should be released to the community.
Sure, I'm not worried about this strategy not working...