# Custom Formula Collection

Slope of a Line

The following custom formula returns the slope of a line. For example, this formula returns the slope of a 14 day run of the security's closing prices.

( (14 * (Sum(Cum( 1 ) * C ,14 ) ) ) - (Sum(Cum( 1 ) ,14 ) * (Sum( C ,14) ) ) ) / ( (14 * Sum(Pwr (Cum( 1 ) ,2 ) ,14 ) ) - Pwr(Sum(Cum( 1 ) ,14 ) ,2 ) )

To apply this to different lines you would replace C with the desired syntax for the line. For example the slope of a 25 period simple moving average would be:

( ( Sum(Cum(1) * Mov(C,25,S),14) ) - (Sum(Cum(1),14) * Sum(Mov(C,25,S),14) / 14) ) / ( (Sum(Power(Cum(1),2),14) ) - (Power(Sum(Cum(1),14),2) / 14) )

You could also make this a universal formula by using the P variable. You could then plot the formula on top of any line.

( (14*(Sum(Cum(1)*P,14) ) ) - Sum(Cum(1),14)*(Sum(P,14 ) ) ) / ( (14*Sum(Pwr(Cum(1),2 ),14 ) )-Pwr(Sum(Cum(1),14),2 ) )

For additional help with formulas, please see the Formula Primer.

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