http://finance.yahoo.com/q?s=SPY Day's range is listed as 85.36 low, but click on the 1 day chart at lowest is 88.81
It was some bad tick at eod. My intraday low is correct not the daily low though. I have Tradestation.
You would think exchanges would fix these bad equity ticks by now. If you must trade ETFs instead of futures due to leverage, you could always trade SPY based on ES charts, futures rarely have bad ticks, if ever and the price action is close to identical.