Hello guys,

About the fees, there is no fixed markup, but a variable one, between 0.15% and 0.25%, depending on distance from ticker price, and bitstamp orderbook "age" (timestamp of the orderbook provided). The main reason is again performances, by grouping orders we don't overload the engine. This may be adjusted within the next few days based on the slippage we get.
You'll note that on average you will pay less fees, as soon as you have a discount on BFX fees.

For the sake of our activity, we will always be as competitive as possible for Bitstamp orders price.

Regarding labelling orders, we'd like to evaluate the need for it. So please if everyone wants a special labelling for orders, can you please jump in and tell us why you need it?

best regards
Raphael
Bitfinex team