价值或性质或场中心“定性”后，波动性定量

价值或性质或场中心“定性”后 upon information full release，波动性定量, traders trade 波动性, which is 保守场，有一定范围，二体问题, sell high end and buy low end,哈密顿动量（而不是简单的位置，至少要考虑速度，质量）定范围

Momentum: A leading indicator measuring a security's rate-of-change. The ongoing plot forms an oscillator that moves above and below 100. Bullish and bearish interpretations are found by looking for divergences, centerline crossovers and extreme readings.

Keltner Channels
Chester W. Keltner introduced and developed the Keltner Channels in his book "How To Make Money in Commodities". Like Bollinger Bands, Keltner Channels are simply moving-average bands. (See The Basics of Bollinger Bands.) Moving-average bands and channels are the same thing: a middle line and two outer lines.

Keltner Channels represent the average of the high, low and the closing price of an issue. On each side of the middle line are bands that are formed from the daily high minus the daily low over a period of 10 days. Technicians believe the theory that the price of an issue is most likely to trade within the boundaries of bands or envelopes. The trader is to sell the issue when the closing price exceeds the upper band and to buy the issue when the closing price falls outside the lower band. This theory is probably best explained in Perry Kaufman's book entitled "The New Commodity Trading System and Methods".


Chart Created with Tradestation

You can see in the above chart of Sun Microsystems, Inc. that on many occasions from Jul 2002 to Feb 2003 the theory that states the stock should be traded when the closing price falls outside the envelopes on either side of the middle line holds true. Arrows indicate a few examples of this happening. You can plainly see that the sell signals are far clearer than the buy signals, so I strongly suggest that all investors add two or three other indicators to their charts to confirm a buy/sell signal of any issue they may be following.