[amibroker] Help request : Plot vertical line

[pacific5_au]

I am trying to Plot a vertical line on a date or dates I nominate.

Have looked back through this list but cannot find what I want.

This is what I've tried -

D1 = DateNum() == 1061001; // 2006-10-01
Plot( D1, "", colorWhite, styleHistogram | styleOwnScale |
styleNoLabel ); 

Can someone please point me in the right direction on this.

Thank you.

Pacific