Volume indicators

OBV: On Balance Volume

Adds the volume on up days and subtracts it on down days, to see whether volume is backing the trend.

用通俗的话解释

The idea is that volume moves before price: big players buying quietly push volume up on up days before the price takes off. OBV keeps a running score.

计算方法

If the close is higher than yesterday's, add today's volume; if lower, subtract it.

OBV = previous OBV + volume   (close up)
OBV = previous OBV − volume   (close down)
OBV unchanged when the close is unchanged

如何使用

OBV rising with the price: the trend is supported.
OBV breaking out before the price: a possible early sign of a price breakout.

得出结论

Look at OBV's trend and divergences, not its value.

示例

An index is flat for a month while OBV keeps rising; the index then breaks out to the upside.

示例中的价格仅作说明。

注意事项

On currencies, metals and CFDs there is no central exchange volume. The chart uses "tick volume", the number of price changes in each candle, which follows real activity closely but is not the number of contracts traded.

一点历史

Joe Granville popularised OBV in his 1963 book "Granville's New Key to Stock Market Profits".

仅供学习参考。没有任何指标或形态能预测未来，本页内容均不构成投资建议。