Remove cells in table if a specific value is an outlier

I want to remove the complete rows of a table if the outlier in the second column which is named 'Close' is an Outlier. I used the following code but no outliers have been removed from the table.

MovingAverage = movmean(NoMV.Close,30)
threshold = 3 * std(MovingAverage);
lowerC = NoMV.Close - threshold;
upperC = NoMV.Close + threshold;
NoMV(NoMV.Close(:)<lowerC, :)=[]
NoMV(NoMV.Close(:)>upperC,:)=[]