Limit max number of concurrent open orders per user
As of winter 2018/19 the order book is full with orders of 0.01gr. Probably because some idiot didn't get his bot right.
At the time of writing the first 20 orders in the buy list consists of 17 orders for 0.01gr and only 3 serious orders with a volume > 0.01gr.
This makes the order book hard to read and sometimes almost useless.
So my suggestion is to limit the number of concurrent open orders to 5. This should be enough for every serious trader.