Order types — market, limit, stop
Why this lesson exists
Most order panels look the same: a few tabs that say Market, Limit, Stop. Most retail traders pick whichever they used last time. That's how a ₹5,000 stop becomes a ₹50,000 loss on FOMC day.
Order types are not interchangeable. Each one trades off something specific: price certainty against fill certainty. Get the trade-off right for the conditions and you save real rupees. Get it wrong on a news print and you can blow through your day's risk in one fill.
This lesson covers the three orders you'll actually use — market, limit, and stop — when each is the right choice, and the failure modes that catch retail traders most often.
The fundamental trade-off
There are exactly two things you can ask an order to guarantee:
- That it fills. You will exit (or enter) the position.
- The price it fills at. You won't pay more (or sell for less) than your specified price.
No order can guarantee both. Markets only have so much liquidity at any given price; if you demand both, you'll often get neither.
- Market orders guarantee a fill. The price is whatever the book gives you.
- Limit orders guarantee a price. The fill happens only if the market reaches you.
Every order type on xtree is a variation of those two ideas.
Market orders: speed at any price
A market order takes whatever liquidity is sitting on the opposite side of the book until your size is filled. If you market-buy 1 BTC and the best ask is ₹85,00,500 for 0.3 BTC, then ₹85,00,800 for 0.5 BTC, then ₹85,01,200 for the rest, you pay a weighted average closer to ₹85,00,900 — not the ₹85,00,500 you saw on the screen.
That gap between the screen price and the average fill is slippage. In a tight, deep book it's negligible. In a thin book or during news, it can be enormous.
The August 2024 yen-carry weekend is the canonical example. As BTC fell from $64,000 to $49,000 over 48 hours, perp asks thinned out across every venue. A 1 BTC market sell at a "screen price" of ₹50,00,000 was filling at a volume-weighted average closer to ₹49,40,000 — ₹60,000 of slippage on a single order.
Use a market order when:
- You need out now and the loss from staying in is larger than any reasonable slippage.
- You're entering a high-conviction setup where missing the move is worse than paying the spread.
- The book is deep and the spread is tight, so slippage is small anyway.
Don't use a market order when:
- The book is thin and you have time.
- A high-impact news event is about to print (FOMC, NFP, CPI, BoJ).
- Your size is large relative to the visible depth.
Limit orders: a price you'll accept
A limit order says: "fill me at this price or better, or don't fill me at all." If you limit-buy at ₹85,00,000 and the lowest ask is ₹85,00,500, your order sits as a resting bid. It only fills if a seller comes down to meet you (or if the price moves down and crosses your limit).
The trade-off is fill uncertainty. Your limit might never get hit. You can watch the move you wanted to catch play out without you, because you priced your entry too aggressively.
The upside is that you pay no spread when you're filled — and on tight markets like BTC perps, you often earn a small rebate (the maker fee can be a small credit on some venues; on xtree, both maker and taker pay 5 bps, so the savings come from avoiding spread rather than from rebate).
In calm conditions, limit orders are nearly always the right choice. Consider 1 BTC with bid ₹84,99,500 and ask ₹85,00,500. A market buy pays ₹85,00,500. A limit buy resting at ₹84,99,500 pays ₹84,99,500 if filled — ₹1,000 saved per BTC. Over 100 trades a month at 1 BTC each, that's ₹1,00,000 in avoided spread.
Use a limit order when:
- The market is calm and your edge can wait for the price to come to you.
- You have a specific entry price thesis (a level, a retest, a re-test of an old high).
- You can afford to miss the trade if the price doesn't reach you.
Stop-loss orders: a trigger that becomes a market order
A stop-loss is a conditional order. You set a trigger price; when the mark hits it, the platform fires a market order on your behalf.
This is critical: a triggered stop-loss is a market order, not a guaranteed-price order. The trigger fires at your stop level. The fill happens at whatever liquidity is available at that moment.
In calm conditions, the difference is small — the mark crosses your level, the market order fills within a few bps. In gap conditions (weekend gap, news print, cascade), the difference can be enormous.
A worked example, hypothetical but mechanically accurate. You set a stop-loss at ₹80,00,000 on a BTC long entered at ₹85,00,000. Overnight, a major macro headline hits while you sleep. The market trades from ₹81,00,000 to ₹78,00,000 with no fills between ₹80,50,000 and ₹78,20,000 — a gap. Your stop triggers at ₹80,00,000 but the next available market liquidity is at ₹78,00,000. You fill there. Your "₹5,00,000 stop" became a ₹7,00,000 loss.
This is structural, not a platform failure. A stop-loss guarantees the trigger; it cannot guarantee the fill price.
Take-profit orders
The mirror of a stop-loss. You set a price level at which the platform fires an exit order to lock in a gain.
On xtree, TP can be configured as a market exit (fires a market sell on long positions when the mark hits the level) or a limit exit (places a resting limit at the level). Market TP guarantees the exit; limit TP guarantees the price but might miss the fill if the move is too fast.
For away-from-screen traders — anyone with a day job, which is most Indian retail — the SL + TP combination is the practical answer. You bracket your trade: stop here, target there, walk away. The trade either makes the target, hits the stop, or sits unchanged until you check on it.
On xtree's order panel, the SL and TP fields appear together as a bracket. You can enter both prices when opening the position, or attach them after the fill. Both fire against the mid-mark, not last-trade, which is consistent with how MLL and DLL are computed (see the orderbook lesson for why mid-mark is the right reference).
When each is the right choice
A short decision table for the situations you'll see most often.
| Situation | Order type | Why | |---|---|---| | Calm market, planned entry | Limit | Avoid spread cost; price is your edge | | Need to exit immediately (loss running) | Market | Slippage < the cost of staying in | | Setting up a trade for overnight | Limit entry + SL + TP | Brackets do the work while you sleep | | Pre-FOMC / CPI / NFP | Avoid market orders | Books thin in the 90 seconds before print | | Strong breakout, must catch it | Market or aggressive limit | Limit-chasing a runner loses more than slippage costs | | Thin altcoin perp | Always limit, smaller size | Market orders into thin books are how retail discovers slippage |
The classic mistake: market-buying into a news print
Half of new traders blow up the same way. The Fed is releasing the decision at 23:30 IST. BTC has been ranging tight all afternoon. The headline drops, BTC starts running, the trader mashes Market Buy.
Their fill is 0.8% above the chart price they saw. The next few seconds reverse on a clarification in the press conference. Their position is now down 1.5% before the move they wanted has even fully developed.
This isn't bad luck. It's mechanical. The order book thins out in the seconds before a known print because market makers pull quotes — they don't want to be on the wrong side of a 1% move. The remaining liquidity is at progressively worse prices. A market order in that window pays for the entire book's worth of caution.
The fix is procedural: never market-order through scheduled news. Either limit-order ahead of the print (accept you might miss the fill), or wait until the dust settles 60–90 seconds after.
Recap
- Market orders guarantee a fill; limit orders guarantee a price. Pick the one that matches what you can't afford to lose.
- Slippage on market orders scales with book depth and your size. Thin books punish market orders disproportionately.
- Stop-loss orders trigger at your price but fill at the next available market price. They don't guarantee the fill level.
- For away-from-screen traders, the SL + TP bracket is the practical default.
- Never market-order through scheduled high-impact news.
Next up: Reading the orderbook — what the bid, ask, and mid-mark are actually telling you about liquidity, and how to spot a book that's about to bite back.
Test yourself
Next lesson: Reading the orderbook — bid, ask, mid-mark, depth, and the imbalance signal that's mostly a trap.