Do we have to wait until the end of the week to get an update on the status of that weekly chart sell signal?
I looked at the chart for the period between the last sell and buy signals you posted (3 May 2010 to 30 August 2010). It looks like AAPL entered a $25 trading range at the sell and took off from the top of that range and added another $50 after the buy signal.
Maybe those signals are not so much Buy/Sell as they are Trade/Hold.
News 
Market Data 
Discover 
