Studying the 'measured move' in GLD

The 123 at-the-money straddle for GLD on the May19 expiry was $2.22+$2.52=$4.74 at the close of Thursday's trading. The options market implies a 1 standard deviation range (68% probability) of approximately 118.26 - 127.74. The 16 delta option strikes are approximately 118 & 131 (slightly higher on the call strike).

I see some resistance on GLD at 124.40 though....