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plotting - How to add arrows in the middle of the Plot-lines


If I got a bunch of numbers,then I can plot it with ListPlot:



{{1, 2}, {3, 9}, {7, 4}, {9, 9}}

 ListPlot[%, Joined -> True]

Then I get


enter image description here


Now I would like to have arrows in the middle of these lines, like this: enter image description here


Or maybe not in this way, but we got arrows in the end of each lines.


That's OK too.


If there is thousands of numbers like that, is there a simple way to add arrows like this?



Can anybody help me with that?




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