Extracting peaks and trough from Noisy data

Hi All
I am new to this forum. Thanks for having me as your member
I am testing some product and getting large amount of data from the machine.
I want to Automate some of the boring data analysis, peak detection, trough detection, if possible the point of change ( this is very difficult because of the data is being noisy and not regular.)
I have adopted this vba code, but this is is very slow. Its taking half an hour to run. Could an experienced user suggest a better way to detect peak and output the x and y value?

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Thanks in advance for your help

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