Market Intelligence › Basic Terminologies
The smallest allowed step of price.
Published by The Retail Trader · JUL 31, 2026 · Order Flow
Tick Size — The smallest allowed step of price. The price order between this will not be accepted.
This term comes under Order Flow, in the section "EXCHANGE RULES THAT APPLY TO ORDER". Sometimes the reason for order rejection is not your broker, it is the exchange's rule:
Other terms in this group — understanding them together is more useful:
• Price Band
• Series
• Trade-to-Trade (T2T)
• ASM / GSM
• Short Delivery
• Auction Session
• Call Auction
• Close-Only Restriction
• Circuit Freeze
• Settlement Holiday
To read the entire group and all its examples in one place, see the journal "ORDER FLOW: FROM ORDER TO EXECUTION" - this term is taken from there.
This entry is for educational purposes only and is not a recommendation to buy or sell. Exchanges change charges, margins, lot sizes and expiry rules from time to time, so verify any figures with your broker or exchange.