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Trendline
Technical Analysis
どういう意味か
A straight line drawn across a series of higher lows (up trend) or lower highs (down trend) to make the trend visible. Price tends to respect it.
例
In an up trend, you draw a line connecting the lows at $45, $50, $55. Price bounces off that line three times, confirming it as a valid up-trendline.
初心者がよくやるミス
Beginners redraw trendlines every time price pokes through, until the line fits their bias. A trendline that needs constant redrawing is not a trendline.