I've used charts to show things clearly. On Monday, there are two critical levels to watch. The first is 19,560 – a critical resistance point because the Index has been stopped by it many times before. If the Index breaks past this point, it might show a new trend (a change in how prices move). The second level is the low point, which might mean the prices will continue decreasing. If prices are between these two levels, it's not a good time to trade. I've also pointed out possible goals if the resistance level is crossed.
So, when you trade, remember these things.