
As mentioned before, bar 2 made a new high with lower volume, showing the resistance above is diminishing. Bar 4 made a new low with higher volume (than bar 2), which shows the support from the downside is stronger than the resistances revealed by bar 2. So far still healthy. However, when bar 5 made another new high with higher volume (than bar 4), it shows more resistance came from the upside. Finally, bar 6 made a new low with lower volume (than bar 5), showing the support is weakened. Although this does not point to an immediate sell-off as the price discovery is still on going, the tone of the market clearly changed.
That said, there are still silver linings I would like to point out.

1. As shown above, the important support (detailed here) still holds. And today the market closed above the support area, meaning the support worked and pushed the market back upwards. The market is still range-bounded.
2. The two defensive sectors, Healthcare and Consumer Staples, kept making lower lows and lower highs in the past few days, suggesting that the market is drawn down by them. When investors expect the market will move higher, they will rebalance their portfolio to reduce holdings from defensive sectors and increase that from offensive sectors, in order to make more profit. So bulls should not worry if defensive sectors led the market down. Please refer to this column of Barron's for detailed discussion on defensive and offensive sectors (may require subscription).
3. There are two offensive sectors, Technology and Financial, making higher lows, while the market is making lower lows. This supports the conjecture that defensive sectors drive the market down.
The price discovery, the range-bounded consolidation, and the potential portfolio rebalance are all indecisive market behaviors. To conclude this, a decisive move out of the range is expected, which is normally forceful and could be damaging. Given the warning signs, it might be wise to take some profit or hedge the risk, at least start thinking about it.