Morphological characteristics: 1, and the stock price is in the low price area; 2. The stock price changes simply and continuously, first slowly falling, then slowly rising, and the K-line connection is circular; The change of trading volume is the same as the change of stock price. At first, it gradually decreased, and with the recovery of stock price, the trading volume gradually increased, which is also a cycle; 4. It takes a long time; 5. At the end of the formation of the "arc bottom", the stock price rose rapidly to form a breakthrough, and the trading volume was also significantly enlarged. Share prices rise rapidly and are often rarely sorted out.

1, especially when the bottom of the pot is formed during the shrinkage of 1- 1.5 months.

2. The stock price runs repeatedly in the middle track of the BOLL channel, and the BOLL channel diverges and converges; 3.KDJ repeatedly crosses the golden fork near 50, and when it breaks through, it goes up from the golden fork below 50; 4.MACD forms a golden cross, and the red measuring column gradually increases.

5. It is best to break through the 5-day moving average recently, which is more than twice the previous moving average.

6. At the end of the pot bottom, the quantity can be continuously enlarged, preferably a U-shaped, arc-shaped Z-shaped or W-shaped bottom corresponding to the K-line.

Internal cause: the bottom of the arc clearly shows the whole process of the gradual change of the strength of both sides: 1, the stock price fell from a high level, the seller's strength gradually weakened, the active selling decreased, and the buyer's strength stopped, so the trading volume continued to decline with the stock price decline. 2. Although the stock price continues to decline, both buyers and sellers are close to exhaustion, so the stock price decline is getting smaller and smaller until it develops horizontally, and the transaction volume is also extremely shrinking. 3. When the stock price fell to a very low level, major institutions or visionaries began to quietly enter the market to collect, and the strength of many parties gradually increased, and the stock price and trading volume slowly increased. Finally, after the collection is completed, the buyer's power completely controls the market and the stock price rises rapidly. Because it takes a long time to change hands at the bottom, after the upward breakthrough, the seller is unable to resist and often does not need to return to the file, and the short-term increase is quite amazing.