code help on oscillator

#1
Hi,

Can any one help me with how to write a code for the following logic.

1. I want a indicator which oscillates between 1 to -1.
2. "1" should be the hhv of all the bars in the stock.
3. the period for the range 1 to -1 should be controlled by a parameter (default 365, range from 50 to 1000). it is like getting full sin wave for 365 days.


Please let me know,
Thank you,
Hema.
 

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