I have seen many times that in local market BTC price are quite change from international market. Once the price of BTC in Indian market (Zebpay)used to be 2-3 lacks more than the price in bitfinnix. But todayBTC price in Indian price is 1 lack less than the price in bitfinnix , which is big ammount in terms of percentage.
BTC price slashed down across Indian markets due to FUD caused by recent Zebpay announcement on uncertainty around INR withdrawals.
https://twitter.com/zebpay/status/1009714919074353152In the past, there were arbitrage opportunities but it was meaningful only after you factor the cost of exchange commission for each transaction.
Yeah, there was a sell-off after Zebpay's announcement, the price did crash to around $5700 in the Indian market. They did the right thing, asking users to withdraw and as couple of other major exchanges make their announcements over the course of next two weeks, panic sellers would take the price further down, a good opportunity to buy some cheap coins in India.