OK. I hear and understand your point and it would be interesting to see the results you speak of.

But what about the 'current' chart? One can argue that since we are now in the future and have more data,  it is best to apply that data going backwards to make a more accurate chart. At this point I am not convinced the historical chart is as accurate as the current chart.

And the current chart already has a perfectly flat 0 trendline.

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Date   6/22/18
VWAP   $6,283.20
x   2897
y   8.745634836
a (slope) historical   0.003307090
b (intercept) historical   -0.109013175
Rsq historical   0.860539
BETI historical   -0.725
Expected Price historical   $12,971.70
Actual price / expected price historical   48.44%
Expected Date historical   11/14/17
# of Days ahead historical   -219.19
Daily VWAP Rank historical   234
Next expected price historical   $13,014.67
   
   
-2.25   $1,367.21
-2.00   $1,755.53
-1.75   $2,254.14
-1.50   $2,894.38
-1.25   $3,716.45
-1.00   $4,772.02
-0.75   $6,127.40
-0.50   $7,867.73
-0.25   $10,102.37
0.00   $12,971.70
0.25   $16,655.99
0.50   $21,386.71
0.75   $27,461.08
1.00   $35,260.73
1.25   $45,275.67
1.50   $58,135.11
1.75   $74,646.96
2.00   $95,848.59