TICK

The TICK suggests the market is going to back off a bit intraday, this is where I'd prefer to open positions, in to price weakness.

This is a great tool for these situations, draw trendlines on the channel moving with the market and a divergence and break of that channel is usually an early head's up that the market averages are going to move down intraday or up if the break up wards from a downward sloping channel