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.