AstroWheel is Metatrader 4 extension that allows user to see geo-cosmic situation for any MT4 bar/candle when it is clicked on Metatrader chart.
Actually, it's an independent astrological program, specially built for using MT4 as a source of the dates of astro-events.

For example, you want to see what special was going on in the sky when long EUR/USD trend stopped,.