A trend lines requires 2 points to draw, and Gann Angle only requires 1 point, a huge difference.
Simply that Gann Angle is not determined by price pivot points at the last price end, where as a trend line is. That is the beauty!
A Gann angle is a measure of the speed of the advance or decline, a measure of time by price of the price action.
The blue arrows show points of support along the blue dotted 2x1 Gann Angle, as stated above drawn off 1 pivot point. A trend line can not do that!
As you can see price is now entering a pinch zone, it will bust out either way.
Example of the INDU
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"Anyone who buys or sells a stock, a bond or a commodity for profit is speculating if he employs intelligent foresight. If he does not, he is gambling." ~ Richard D Wyckoff
"Look at market fluctuations as your friend rather than your enemy; profit from folly rather than participate in it." ~ Warren Buffett