
Originally Posted by
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Rule of the thumb about trendlines: the more evident and more touches the trendline has, the more powerful the market reaction will be upon the breakout. Basically everybody has the same trendline drawn on their charts and all of them respond on cascade upon the breakout (either to trigger into place, or stoplosses being run or to manually exit an present position), thus propelling the breakout throw even further.
Beware of unclear trendlines. Ask yourself when drawing a trendline: do this trendline be evident to each trader? If not, the market reaction upon the breakout will be minimal.