Gold: From this 4-hour chart, this is a very typical "breakdown crash" action.

The Bollinger Bands have shifted from support to resistance with a downward opening, which is a classic signal of an established bearish trend. Price has continuously broken through both the middle band and lower band, indicating extremely heavy selling pressure above with bulls having no room to fight back.

The last candlestick directly broke through the 4300 round number level, with lows explored at 4124. The appearance of this "long lower shadow" often suggests that follow-up buying interest is entering, but it could also be a "bear trap" or "panic selling" emerging.

Although KDJ is at low levels, the J line still shows signs of downward divergence; MACD has formed a death cross pointing downward with expanding green bars, indicating that downward momentum has not been exhausted. Where the "bottom" is remains unclear for now.

When the Bollinger Bands are opening downward and price breaks through the lower band, "rebounds are opportunities to short."

Today's suggestion: Watch for shorts around 4300-4370 on rebounds; downside targets at 4175-4120. If previous lows break, continue monitoring 4050-4000.