The rot started 28 th Feb when the volume was 20 times what it normally is. Someone obviously sold down in a hurry and you'll never know why, so no use speculating.
The price is all over the place with the SP gapping down as much as 4 pips at a time. Volume still 2 to 3 times higher than normal so just have to wait for the sell down to finish and the price to level out.Must be close to the end now..