Lines of trends, support and resistance
The trendline. A trendline is a main initial element for the price chart analysis. While the
market moves in any direction not along a straight line but along a zigzag, the mutual
placement of upper and bottom points of those zigzags permits to plot a line connecting the
significant highs (peaks) or the significant lows (troughs) of an appropriate zigzag using
technical tools of the computer program.
To draw a trendline only two points are necessary and the third one is the contact point
confirmation. On a bullish trend chart it should be drawn using troughs, on a bearish
using peaks. The trendline and a line which is about parallel to it and drawn on the
opposite side (through peaks on a bullish trend and through troughs on a bearish) form the
trade channel. Both lines are then channel's borders.
Lines of support and resistance. The upper and the bottom borders of trade channels are
called accordingly support and resistance lines. The peaks represent the price levels at
which the selling pressure exceeds the buying pressure. They are known as resistance levels.
The troughs, on the other hand, represent the levels at which the selling pressure succumbs
to the buying pressure. They are called support levels. In an uptrend, the consecutive
support and resistance levels must exceed each other respectively. The reverse is true in a
downtrend. Although minor exceptions are acceptable, these failures should be considered as
warning signals for trend changing.
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