Calculated Field to see if point is greater than Standard Deviation

Question

I wanted a calculated field to see the standard deviation of transactions

I have used a formula

If [AMOUNT] > STDEV([AMOUNT]) THEN "bad"
ELSE "good"
END

and i am getting a error 

Answer 1

Use this calculated field

If [AMOUNT] > {STDEV([AMOUNT])} THEN "bad"
ELSE "good"
END 

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