I came across this video on youtube, for a more clear view on supply and demand, i thought it would be helpful to other community members as well. So, i decided to share it here with you guys .

https://www.youtube.com/watch?feature=player_embedded&v=PEMkfgrifDw

[video]https://www.youtube.com/watch?feature=player_embedded&v=PEMkfgrifDw[/video]
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