OKCoin VS BTCE: LTC Price Converted to USD/ Displaying Diff

OKCOIN LTC/CNY chart converted into USD.
Then Compared against BTC-e LTC/USD.
The difference between these two exchanges are then output as a number showing the delta (difference) between the two exchanges.

Positive number indicates that BTC-e is above Chinese Exchange prices.
Negative number indicates that BTC-e is below Chinese Exchanges prices.