Can Stocks Hold the $4100's?

Stocks have continued to tumble, testing lower levels in the 4100's. We have plummeted past 4188, and are testing 4122 at the time of this writing, which is the last level in the 4100's. If this does not hold, there is a vacuum zone below to 4068, then 4009. Support seems to be holding for now, confirmed by green triangles on the KRI. The Kovach OBV seems to have leveled off from its bearish decline, so we may see a pivot off support. If so, 4188 is a reasonable target.