...or is it resistance?
Looking for support in a strong momentum move can be pretty straightforward (so long as support holds ;). What we had to go on in today's SPY sell-off were prior consolidation ranges, between $117.50-$119 (Resistance-becomes-Support). After having potential targets in mind, it becomes a matter of watching for selling exhaustion (TICK divergences and higher lows within your target boundary).Here's a look at the SPY daily price congestion ranges

Here's a look at the volume profiles, showing the primary congestion range

What's really interesting is the following monthly chart of the SPY. The $119-$120 level (where we found support today) coincides with a mid-point of the S&P500 going back 12 years.

Also interesting is how the above chart looks a lot like the one below...so, is the current phase finished, or only half-finished? :)

The QQQQ closed the week just under the $50 mark:

One further observation;
The Dow closed just barely above the 11,000 mark. Take note of how long price has previously bounced between the 10,000 and 11,000 levels before: