Hi' @rogertaggart,
Thanks for your suggestion but i did try halftrend 1.02 but still didn't work out very well to mimic the result.
However the MagicArrowSystem have 6 output in the data window and so does the HalfTrend, but the difference is on MagicArrowSystem, the first and second output are always -1 when there's no arrow, it'll going to change when an arrow appear.
Thanks for your suggestion but i did try halftrend 1.02 but still didn't work out very well to mimic the result.
However the MagicArrowSystem have 6 output in the data window and so does the HalfTrend, but the difference is on MagicArrowSystem, the first and second output are always -1 when there's no arrow, it'll going to change when an arrow appear.