Still a buy signal, even after yesterdays nice increase. SPY has pierced through the Bollinger band high, however, RSI is at 66.52. 70 would have signaled a sell. However, what's really interesting is only twice over the past three years has MACD retreated below zero (0) the day after going positive as yesterday.
Therefore, this trend may continue, perhaps another 1.78%, based on RSI, MACD and my data (of price action after piercing through the bands). However, I would be careful. I'm am not adding new money and placing "stops" on most of my positions.
Disclosure: I am long SPY.