Market depth is a metric, which is showing the real liquidity of the markets. Due to rampant wash-trading and fake activity - volume currently isn't the most reliable indicator in the crypto space.
What is it measuring?
It's measuring 1% or 10% section of the order book from the midpoint price (1%/10% of the buy orders, and 1%/10% of the sell orders).
Why it is important to use only 1% or 10%?
It's important, because measurement of the whole order book is going to give false results due to extreme values, which can make false illusion of liquidity for a given market.
What is showing Historical Market Depth?
Historical Market Depth is showing the history of liquidity from the markets for a given asset. It’s a measure of combined liquidity from all integrated markets on the coinpaprika’s market depth module.
Good
Liquidity to Volume ratio (CO/Vol based) on this market is good, and volume seems to be accurately represented.
Average
Liquidity to Volume ratio (CO/Vol based) on this market is average, reported volume by exchange can be higher, than it is in reality.
Bad
Liquidity to Volume ratio (CO/Vol based) on this market is bad, there is high probability that volume is inflated (e.g. wash-trading), or market isn't liquid enough (low volume exchange).
No data
There is no data, available regarding this market.