Order Types, Circuits and Settlement: Speaking the Market’s Language

Direct Equity — Arc 1, Article Three

The Basics

Limit order vs market order: the fundamental choice

Market order — fill me now, at whatever the book offers. Speed is guaranteed; price is not. In a liquid large-cap, the price you receive sits within paise of the screen. In a thin stock, a market order walks the book — consuming successively worse quotes until it is filled — and the slippage can cost more than a year of brokerage in a single click. Remember what the screen actually shows you: the price of the last trade. Your market order transacts at the next available ones, which is a different number whenever the order book is thin or moving.

Limit order — fill me at my price or better, or not at all. Price is guaranteed; execution is not. A limit buy at ₹500 executes at ₹500 or lower, or it waits unfilled while the market stays above. The cost is the chance of missing the trade entirely; the benefit is never being surprised by your own fill.

The house rule this pillar repeats: long-term investors should default to limit orders — placed at or very near the current quote when you simply want in, tighter when you are genuinely patient. In liquid names this costs you nothing at all. In illiquid names it saves you from donating to whoever is sitting on the other side. The only real argument for a market order is an urgent exit in a liquid stock, and urgency itself deserves suspicion in an activity measured in years.

In practice, placing a good limit order takes about fifteen seconds. Open the market depth window — every broker platform shows the top five bids and asks with their quantities — and look at two things. First, the spread: a gap of a few paise on a stock trading at ₹500 tells you the book is liquid and almost any sensible limit will fill. A gap of two rupees tells you to slow down. Second, the quantities: if the best ask shows 40 shares and you want 300, your order will consume several price levels, so set your limit at the level you are genuinely willing to pay rather than at the top quote. Partial fills are normal and harmless — the unexecuted remainder simply sits in the book, and you can modify or cancel it at any time.

The Rest of the Ticket

Protective and conditional orders

Stop-loss orders trigger when the price touches a level you choose. There are two flavours and the difference is not cosmetic. SL-M fires a market order on trigger: a certain exit at an uncertain price. SL-Limit fires a limit order: a protected price, but in a fast fall the market can blow straight through your limit and leave you holding an unexecuted order and the position — the classic SL-L trap, and the reason traders who rely on stops usually use SL-M. Investors following this pillar’s risk framework use stops selectively, with one honest caveat: a stop-loss mechanically converts a drawdown into a realised loss. Whether that is protection or self-harm depends entirely on whether your reason for owning the stock has changed, which a price level cannot know.

GTT — Good Till Triggered — is the long-term investor’s quiet friend. It is a standing instruction that survives for months rather than expiring at day-end: buy this if it falls to ₹450; sell if it reaches ₹800 or falls to ₹550, in the two-legged variant. A GTT order lets a plan you made calmly wait for its price without you watching screens — the mechanical embodiment of deciding once and executing automatically. For an investor who has finished researching a company but finds today’s price unattractive, it is the correct tool, and it converts patience from a virtue into a setting.

The remaining ticket fields take less explaining but cost more when they are wrong:

Field	Option	What it does
Validity	Day	The order dies unfilled at 3:30 PM
Validity	IOC	Fills immediately, in full or part, and cancels the rest
Validity	AMO	Queues overnight for the next session’s open
Product type	CNC / Delivery	Buying to own — full cash paid, shares to your demat. The only product type this pillar’s methods use
Product type	MIS / Intraday	Leveraged, with automatic square-off before the close. A trading product with trading economics

The product type field deserves a warning out of proportion to its size. Selecting MIS when you meant CNC engages leverage you did not want and hands your position to the broker’s risk system, which will square it off around 3:15–3:20 PM at whatever price exists at that moment. It is the single most common costly misclick in Indian retail investing, and the fix is a habit rather than knowledge: check the product field every single time until doing so is reflex.

Speed Brakes

Circuit breakers: how the market stops itself

Stock-level circuit filters cap how far an individual stock can move in a single day. For stocks without derivatives, the exchanges assign a band — 2%, 5%, 10% or 20% from the previous close — based on volatility and surveillance concerns. A stock “hitting upper circuit” means buyers are queuing at the maximum permitted price with no sellers; trading effectively freezes at the band. Two practical implications follow. Circuits on illiquid stocks can lock you in for days, which is a favourite mechanic of the pump-and-dump schemes our article on stock market scams dissects — the exit door closes at exactly the moment you need it. And a circuit is information: something has repriced this stock faster than the band permits, and finding out what should precede any reaction.

Market-wide circuit breakers halt everything when the index moves sharply. The halt length depends on both the size of the move and the time of day it occurs:

Index move	Before 1:00 PM	1:00 – 2:30 PM	After 2:30 PM
10%	45-minute halt	15-minute halt	No halt
15%	1 hour 45 minutes	45-minute halt	Trading halted for the day
20%	Halted for the day	Halted for the day	Halted for the day

Trading resumes after each halt through a fresh pre-open call auction, so prices restart from a discovered level rather than mid-panic. These breakers have triggered only a handful of times in Indian market history — March 2020 being the most recent memorable instance. Nothing is required of you when they fire, except the reminder they encode: the machinery expects extreme days and has brakes built into the design. Current band assignments for individual stocks are published daily by the exchanges; the NSE site carries the live list.

The Timetable

T+1 settlement in India, step by step

India runs a T+1 rolling settlement cycle — trade on Tuesday, and by Wednesday the clearing corporation’s pay-in and pay-out have completed. It is among the fastest cycles in the world, and it was implemented ahead of most developed markets.

What that cycle means in daily practice comes down to four things. Bought shares appear in your demat on T+1, typically in the evening, though your broker shows the position immediately as a T1 holding. Sale proceeds are usable for fresh purchases at once with most brokers, but withdrawable to your bank only after T+1 pay-out. Selling before delivery — buying today and selling tomorrow, commonly called BTST — is permitted by most brokers, carrying the small structural risk that your own seller fails to deliver. And short delivery, when a seller does fail to deliver, triggers an exchange auction: the exchange buys the shares in the market on the defaulter’s account, and the buyer receives them, or a cash close-out, a couple of days late with penalties charged to the defaulter. The buyer is made whole by the system rather than by chasing a stranger — which is the clearing corporation’s whole purpose, described in the first article of this arc.

The optional T+0 window is the newest layer: same-day settlement for eligible stocks — currently the larger, more liquid names — for orders placed in the earlier part of the session, settling by late afternoon. Sell in the morning, money in hand by evening. It runs as a parallel optional window alongside normal T+1, broker support varies, and the two windows can show fractionally different prices for the same stock. For a long-term investor it is a convenience for the occasional urgent-liquidity day rather than a change in method. Rollout timelines have been extended more than once and remain a work in progress, so check what your broker currently supports rather than assuming.

One tax-relevant subtlety worth planting here: for capital gains purposes, your holding period runs from settlement-based ownership, and first-in-first-out applies within each demat account when you sell part of a position bought in tranches. The taxation article in Arc 4 works through the consequences properly, and they are larger than they sound.

Key Takeaways

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Frequently Asked Questions

Your questions answered

Why did my market order fill at a worse price than the screen showed?

Because the screen showed the last completed trade, while your order consumed the next available quotes in the book. In liquid names that gap is a few paise. In thinly traded ones it is the slippage this article warns about, and it can exceed every other cost of the trade combined. Our brokerage and charges calculator shows the explicit costs; slippage is the invisible one, and limit orders are the fix.

I bought shares yesterday — why are they not in my demat yet?

T+1 pay-out typically credits demat accounts by the evening of the next working day, and your broker shows the position as a T1 holding in the meantime. If shares are genuinely missing after T+1, check the CDSL or NSDL statement first — the depository’s record is the authoritative one — and only then raise it with the broker.

What happens if I chose Intraday (MIS) by mistake?

The broker’s risk system squares the position off automatically around 3:15–3:20 PM at the prevailing market price, potentially locking in a loss you never intended to take. If you notice in time, most platforms allow converting the position from MIS to CNC provided you have the full purchase amount available. Do the conversion the moment you spot it rather than at 3 PM.

Can I cancel or modify an order after placing it?

Any unexecuted order, or the unexecuted remainder of a partially filled one, can be modified or cancelled instantly from the order book. Executed trades are final — there is no undo on a fill. That is one more argument for limit orders, and one fewer decimal-place typo turning into a permanent problem.

A stock I hold is locked in lower circuit. What are my options?

Practically: place a sell order at the circuit price and wait your turn in the queue each day until liquidity returns. There is no mechanism for forcing an exit when no buyers exist at any permitted price. Prevention is the real answer here — position sizes small enough that any single stock freezing is survivable, and appropriate scepticism toward the illiquid movers where circuits function as a trap by design.

Is a GTT order safe to leave running for months?

Mechanically yes — it sits with the broker and fires only on your trigger, and you can cancel or edit it any time. Two things to watch. A GTT is not immune to the reason a price fell: if a stock drops to your buy level because something broke in the business, the order will happily buy it anyway, so a standing instruction deserves the same quarterly review as the position it would create. And GTT validity has a maximum term that varies by broker, usually around a year, after which it expires silently rather than executing.

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