MP is copyrighted and licensed by CBOT. So, any s/w program that shows MP has to pay $7/user as royalty to CBOT. Most of the MP charts/indicators are illegal.
Unless Zerodha pays $7/user to CBOT, there is no chance of showing MP legally.
On top of that, Pi is based on modulusfe and here is a link from modulusfe's blog talking about the same.
http://blog.modulusfe.com/2012/05/cbotcme-market-profile.html
Also check the CME website for authorised vendors list(under Resources link on the left side of the page)
http://www.cmegroup.com/education/interactive/marketprofile
If a trader is serious about MP(i.e if he wants to see both TPO and footprint charts), esignal addon($50) is the cheapest resource for Indian traders right now. MarketDelta is more than 100 bucks. Another method is to use esignal data to connect to Ninjatrader and use NT 7 based indicators(provided by 3rd party - usually 50-$100/month subscription)
P.S. @age-of-turbulence-- Just realized that you use MS/Xenith to see charts. Do we have MP indicators or MP charts in MS?