What happens if the exchange rates and quantity are equal?

If the prices and quantities of any scrip are the same, then the order would be sent at the preferred exchange. Otherwise, the remainder order will be sent to another exchange.

Illustration

Market Depth
 

BSE		NSE
Qty	Rate	Qty	Rate
100	100	100	100
200	101	200	101

 

Order: Purchase 500

100 quantities of NSE are available at the best price, 100

100 BSE quantities available at the best price of 100

200 NSE quantities available at the best price of 101

100 BSE quantities available at the best price of 101