Code:

```
# Leavitt, Jay A., PhD [2017]. “Beyond The Hull With Leavitt Projections,” Technical Analysis of StockS & commoditieS, Volume 35: February.
script LeavittProjection{
input y = close;
input n = 20;
rec x = x[1] + 1;
def a = (n * sum(x * y, n) - sum(x, n) * sum(y, n) ) / ( n *sum(Sqr(x), n) - Sqr(sum(x, n)));
def b = (sum(Sqr(x), n) * sum(y, n) - sum(x, n) * sum(x *y, n) ) / ( n * sum(Sqr(x), n) - Sqr(sum(x, n)));
plot LeavittProjection= a*x+ b;
}
script LeavittConvolution
{ input price = close;
input n = 20;
def intLength = Floor(Sqrt(n));
plot LeavittConvolution = LeavittProjection (LeavittProjection (price, n), intLength);
}
def price = Close;
input length = 9;
def intLength = Floor(Sqrt(length));
plot LeavittConvolution = LeavittProjection (LeavittProjection (price, length), intLength);
LeavittConvolution.AssignValueColor(if LeavittConvolution > LeavittConvolution [1] then Color.GREEN else Color.RED);
```