Buy the lows, sell the highs. That is how asset investment works if you do it right. Apparently it is not the case on Kraken, one of the oldest crypto exchanges. A Kraken bug had messed up the order book of the firm.

The bug has allowed traders to buy crypto assets at the lowest prices and sell at the highest buy prices. According to the firm, the exchange was testing an unreleased advanced order type mechanism when it encountered a bug. The glitch in the process helped some lucky traders. They triggered trades at the wrong ends of the order books, without intervening any liquidity in between.

The traders bought SegWitcoin(BTC) for $8,000 and sold them for $12,000, which is a nice and quick way to get a handsome profit. However, the company triggered the stop orders and correctly filled it at market price. The company asked the Kraken bug affected to get in touch by submitting a support ticket. However, this did not stop the users from criticizing the firm since this is an amateur mistake. Jesse Powell, co-founder, and CEO of Kraken has defended the exchange’s actions by explaining that it was important to live test the products, even if there was a chance of error.

Last month, the exchange acquired a startup, Interchange. Thus, it allows institutional investors to access tools for efficient cryptocurrency portfolio management, the source says.