@s1mmxn3 Yes! You can use a straight edge for this. 👍
Just add a string on the far left and far right. Then use backward-forward knots onto the extra string on the left on even number rows. And use forward-backward knots onto the extra string on the right on even number of rows.
(Masha Knots on YouTube has a very helpful tutorial on using the straight edge technique for normal patterns)