Hi @q0987, you can get the best bid and ask by subscribing to the ticker channel:
{“type”:“subscribe”,“channels”:[{“name”:“ticker”,“product_ids”:[“BTC-USD”]}]}.
Otherwise, if using l2update messages from the level 2 channel we cannot reduce the amount of data we send on this channel and this will have to be managed / maintained on the client side, discarding whichever data you do not need.