you are misunderstanding... the inside market here in steemit is Steem/SBD and i'm buying at 2.75 SBD and selling at 2.95 SBD, so 0.2 profit per steem (and we just a had a little change, it might go to 2.9buy and 3.1sell). i never said i was buying in bittrex/polo and selling here.
in bittrex, the market is steem/btc, so it's completely different and you need to take in account the value of steem/btc and sbd/btc.
RE: How to Purchase STEEM at a Discount on the Internal Markets by Locking in an 18% Margin of Safety - Profit on Undervalued Currencies and Increase Your Share of the Stake (SP) in the Ecosystem