message: fix display exchange rate
diff: @@ -7,7 +7,6 @@ import Row from '../Row/Row'
  import Value from '../Value/Value'
  import { FormattedMessage, injectIntl, defineMessages } from 'react-intl'
  import BigNumber from 'bignumber.js'
  -import config from 'app-config'
  const title = defineMessages({
  @@ -23,13 +22,13 @@ class ExchangeRate extends PureComponent<any, any> {
  const { sellCurrency, buyCurrency, exchangeRate, intl } = this.props
  return (
  <Row title={intl.formatMessage(title.ExchangeRate)}>
  - <Value value={1} currency={buyCurrency} />
  + <Value value={1} currency={sellCurrency} />
  {' '}
  <div styleName="equal">
  <FormattedMessage id="ExchangeRate14" defaultMessage="=" />
  </div>
  {' '}
  - <Value value={new BigNumber(exchangeRate).toString()} currency={sellCurrency} />
  + <Value value={new BigNumber(exchangeRate).toString()} currency={buyCurrency} />
  </Row>
  )
  }
  