how to connect highs using a curve

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i have 3 highs on a chart

i can connect them using trendline but it looks flat so i want them to connect in a way it looks like arc

so which object i can use to connect them with a curve using code?

like this


 

Until you can state your requirements in concrete terms, it can not be coded.

You state you have “three highs,” But I count eight (8) fractals.

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