Both the StockTwits and Twitter momentum indicators for the S&P 500 Index (SPX) are confirming lower prices, but are getting to levels that have led to a bounce over the past two years. The strong rally out of the 2012 lows have kept any dip below zero in momentum short. Keep an eye on the duration of this dip for clues that the market might be building a top. Another thing to watch is the next peak in momentum. It needs to surpass the last peak to keep the bulls in the game.