update docs on LMPConfig for market depth

primitives/orderbook/src/lmp.rs

@@ -90,7 +90,10 @@ pub struct LMPMarketConfig {
 	// refer: https://en.wikipedia.org/wiki/Bid–ask_spread
 	pub max_spread: Decimal,
 	// Minimum depth an Order must have to be eligible for LMP
-	// In Quote asset. ( it is basically volume of that order )
+	// In Base asset. ( it is basically (qty-filled_qty) of that order )
+	// For example, if the order book shows that at a price of $10,000 (quote asset),
+	// there are 5 BTC (base asset) available to buy or sell,
+	// the order depth at that price level is 5 BTC.
 	pub min_depth: Decimal,
 }