I think in this round the SP500 middle line is at 1611. Now the top is at 1648. (1648-1611=37; 1611-37=1574) 
Should 1611 be broken, 1574 would be inevitable. 
 
Initially I thought the left translated V top would be around 1670.  
 
Please note, before 1611 is truly broken, additional left translated V is still possible. |