New to metatrader 4... need help!

So I had a demo account with forex.com and got used to their platform. I especially liked how you could modify the stop loss and limit orders by moving them around right on the chart. When I switched to MT4 I contacted a customer support rep at my broker to see if it was possible to modify your SL and TP lines right on the chart and he said that you could do it with certain addons and plugins but he couldnt tell me where I could download them. I am not even sure how to search for these kinds of things on internet. Can anyone out there tell me where I can get these kinds of charting addons and plugins??

Thanks

Try the file attached.

ok, thanks but I have no idea what to do with this file. Where do I download the file to? How do I use it?