Quick update...

Date   8/19/18
VWAP   $6699.18
x   2963
y   8.809740
a (slope) historical   +0.0032730580
b (intercept) historical   -0.0754331731
Rsq historical   0.865930
BETI historical   -0.8128979
Expected Price historical   $15,102.83
Actual price / expected price historical   44.357%
  
-2.00    $2,043.95
-1.50    $3,369.90
-1.00    $5,556.02
-0.50    $9,160.33
-0.25   $11,762.10
+0.00  $15,102.83
+0.25  $19,392.42
+0.50  $24,900.36
+1.00  $41,053.76

Interestingly, Bitstamp's ATH on Sunday, 17 December 2017 12:25:03 ($19666.00) is currently BETI +0.264009.