[Bitcoin] Spot price vs Futures indicator

A handy script to detect opportunities in the futures market during extreme movement.
During rallies, futures usually tend to be US$10 above spot price, on the other hand it can be $1 below spot price when the price starts to decline.

You could also draw a trendline to it :) measuring the amount of risk people are willing to take just to predict future prices in the rally/decline.

Credits to lowstrife for the idea, I'm just implementing it :)