Not all of the S&P's component stocks have been participating in the rally. In fact, Apple ( AAPL), its biggest component, has been forming the opposite pattern since last October. But that could be about to change. Apple's downtrend has been every bit as orderly as the uptrend that the rest of the market has been enjoying. Each test of trend line resistance has sent supply flooding shares and pushed this big name back down into the channel -- until recently, that is. This week, AAPL is testing a breakout above resistance. That could mean an end to the selling in shares of the world's biggest company. >> Tech Stocks Rising on Big Volume Not so fast, though. Apple has tested resistance in the past only to get swatted lower. This won't be a reversal until AAPL can start making higher lows (that's requisite for an uptrend). We'll get an early buy signal if Apple can catch a bid above its most recent swing high at $466. If AAPL can hold above that previous price ceiling, we've got a buy signal for more aggressive Apple bulls. Then I'd recommend keeping a protective stop on the other side of the 50-day moving average; it should start looking like a decent proxy for support when a move through $466 happens.