How to refresh annotations (in figures) using a timer function? See code below. I want to have this arrow "update" or refresh in spatial position everytime the timer calls the plot function. Thank you!

Sample code that I want to fresh in a figure using a timer...

        [Xf, Yf] = ds2nfu(data.tickX(end,1), data.dClose(end,1));
        h=annotation('arrow',[Xf*1.05 Xf*1.01],...
        [Yf Yf],'Color',[1 0.600000023841858 0],...
        'LineWidth',2,...
        'HeadStyle','cback1');