Lace: How to Read a Chart

Tonight, I tried to pick up where I left off on my Traveling Roses Scarf:

I had the chart in front of me, and I stared and I stared for minutes and minutes. Dinner was on the verge of burning, but I couldn't tear myself away from that chart until I deduced properly where I'd left off. I began to mutter, to curse, to squint. How could I be so lost? How could it be this impossible to find my place? I'd only put it down less than two weeks ago! Confoundit, that stupid, mother-effing piece-of-crap pattern written by the biggest b--

Oh.

I was holding the paper upside-down.