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Greetings All,
I like to experiment with different period standard errors bands, plotting
the higher or the lower band by themselves. I assume that the only
alterations I would need to make in the following formula (copied from the
equis collection) is to change all of the "21s" to, say "13s" or "34s" etc.
But what about that "19" at the end of the formula. Could someone explain
how that would have to be changed. The smoothing factor of "3" I will
simply leave as is for the moment.
21 period Lower Band (smoothed):
Mov((21 * Sum(Cum(1) * C,21) - Sum(Cum(1),21) * Sum(C,21)) / (21 *
Sum(Pwr(Cum(1),2),21) - Pwr(Sum(Cum(1),21),2)) * Cum(1) +(Mov(C,21,S) -
Mov(Cum(1),21,S) * (21 * Sum(Cum(1) * C,21) - Sum(Cum(1),21) * Sum(C,21))/
(21 * Sum(Pwr(Cum(1),2),21) - Pwr(Sum(Cum(1),21),2))) -
2*(Sqrt(((Sum(Power(C,2),21)-(Power(Sum(C,21),2)/21)) -((Sum(Cum(1)*C,21))-
((Sum(Cum(1),21) * Sum(C,21)/21))) / ((Sum(Power(Cum
(1),2),21))-(Power(Sum(Cum(1),21),2)/21))*((Sum(Cum(1)*C,21))-
((Sum(Cum(1),21)*Sum(C,21)/21)))) /19)),3,S)
Best regards,
Philip
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