Divergence
Defined as an indicator diverging away from price
Most of the indicators above will display divergence at times;
they are MACD, Stochastic, RSI, in fact most oscillating
indicators. If price is making lower lows but the indicator is
making higher lows, there is divergence. If price is
making higher highs but the indicator is making lower
highs, there is divergence. This suggests a slowing of momentum and
a possible end to the current direction of price.
The two prominent points in a trend where divergence can be seen
the most are towards the end of the trend, and towards the end of
corrections (pullbacks). For a trigger event, we are looking to use
them to alert us to the end of a pullback.
In a bullish uptrend, in order to use divergence to alert us to
the end of a pull back we need to see two lows in price, where the
second low is lower than the first low. The indicator must also
create two lows but where second low is higher than the
first low.
In a bearish downtrend, in order to use divergence to alert us
to the end of a pull back we need to see two highs in price, where
the second high is higher than the first high. The indicator must
also create two highs but where second high is lower than
the first high.
The following diagram shows us a pullback in a bullish up trend.
We see price making a lower low, however the oscillator (in this
case stochastic), is showing a higher low. This is
divergence and a bullish sign.

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4 - Module 2 > Trading System Builder Tool Kit: Trading Rules
> Trigger: Volume
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