Hi tradelove,
it should be possible using
cobj.setAttrInt(IChartObject.ATTR_INT.ARROWCODE, n);
with cobj being the pricemarker object and n being an integer containing the arrow code.
I didn't see a list of the arrowcodes in the documentation and I haven't used the function yet, so I guess you just try some integer values starting from 0 and see how the arrow changes...
Best, RR.
PS: @DukasCopy - could you please point us out to a list of possible arrow codes? thx a lot.