DJA Dow Jones 24hr potterboxes.DJA Dow Jones 24hr potterboxes. As we can see the Dow bounced from the 50 percent line or cost basis.$12,806.32 ish. Thats why I like to go back and look to the left and find the support area that maybe it will hold at. If the candle opens on or above the 50 percent line or cost basis. It will make