If you remove the current signal from a normal zigzag, you will get an AlexD zigzag that does not redraw.
And if you add a Donchian channel with the same period, you will see that zigzag signals appear where the price has broken through the channel.
It means,
that an ordinary zigzag should be considered as an indicator of a price channel breakout, where the direction of the beam shows the direction of the breakout. Opening against the direction of the beam, as everyone thinks, is possible only along the trend when the breakdown is false and a reversal in the direction of the trend is likely