Each set is drawn over the day the pivots were calculated and extended into the next trading day. As can be seen, the support and resistance levels provided approximate targets for the market in each case. For June 18, the early market drop occurred on minor news. The rest of the precious metals complex was under pressure that spilled over into gold. Later, when the second support level was broken, the market fell apart.
Pivot points have a large following with floor traders.
However, tick charts show that these levels do not always provide meaningful signals. They should be used as part of a complete set of technical tools but never after market moving news or in active markets.