Look back function

[cosbyva]

I'd like to write an EFS that:

1. looks back over a certain number of bars of an existing efs function and finds the highest high of this function within that period and

2. then add the highest high to a Simple moving average and

3. Plot it on the price chart.

Can you point me in the correct direction.

Thanks

[John2006uk]

cosbyva

You could use the 'upperDonchian' study to return the highest high of your existing efs function over a certain number of bars, the rest is pretty straight forward.