code: def newfeed(ctx, symbol, price, market, cer, mssr, mcr, account):
      
      if cer:
          cer = Price(cer, quote=symbol, base="1.3.0", bitshares_instance=ctx.bitshares)
  
      print_tx(
          ctx.bitshares.publish_price_feed(
              symbol, Price(price, market), cer=cer, mssr=mssr, mcr=mcr, account=account
          )
      )
docs: Publish a price feed!
  
          Examples:
  
              \b
              uptick newfeed USD 0.01 USD/BTS
              uptick newfeed USD 100 BTS/USD
  
          Core Exchange Rate (CER)
          \b
          If no CER is provided, the cer will be the same as the settlement price
          with a 5% premium (Only if the 'market' is against the core asset (e.g.
          BTS)). The CER is always defined against the core asset (BTS). This
          means that if the backing asset is not the core asset (BTS), then you must
          specify your own cer as a float. The float `x` will be interpreted as
          `x BTS/SYMBOL`.