Every blown account was two words from survival.
काट दो.
KaatDo (काट दो — cut it) watches your broker account from the server side. The second your rules break — loss limit, trade cap, expiry-day clock — it does what the name promises: every order cancelled, every position flattened, the day locked. It doesn't ask how you feel about it.
6 brokers
official broker APIs
AES-256 token vault
every action audited
runs even if your PC is off
Animated replay of a real kill sequence: the profit and loss falls to the configured limit, the engine cancels orders, squares off positions, verifies the account is flat and locks trading for the day.
One bad session. Two endings.
Same trader, same morning, same first loss. The only difference is what happens after the plan stops working.
Counted from our own audit log, live. Small numbers are honest numbers — we'd rather show you zero than a fake testimonial.
Six brokers. Your own API app. Your own static IP.
Browser login where the broker offers one, a 30-second daily token paste where it doesn't. KaatDo never sees your password, and every order leaves from a static IP registered to you alone — exactly what the 2026 exchange rules ask for.
Fyers
Browser login · free API app · broker-side exit backstop
Upstox
Browser login · free API app
Zerodha BETA
Kite Connect personal app · browser login · free
Angel One BETA
SmartAPI · browser login · free
Dhan BETA
Daily token · free · can lock your account after a kill
Groww BETA
Daily token · Groww's API is ₹499/mo
BETA = built on the official API docs and awaiting its first verified live kill. Run a one-share test before you rely on it; we say so inside the app too.
Broker names and logos are trademarks of their respective owners and are shown only to indicate which APIs KaatDo works with. KaatDo is an independent tool — not affiliated with, endorsed by or a partner of any broker.
Anatomy of a kill.
A verified state machine runs your exit — not a panicked human. Every stage is retried, timestamped and written to an audit log you can read afterwards.
Breach
Rule evaluated on every poll and every pushed order event.
t+0s · detectedCancel
All working orders cancelled first, so nothing fills mid-flatten.
t+~1sFlatten
Every position squared off at market. Big lots auto-sliced.
t+~2sVerify
Polls the broker until the account is provably flat. No assumptions.
t+~5sRe-fire
Straggler leg? Partial fill? The sequence fires again. And again.
as neededLocked
Until 15:30 IST, any new trade you sneak in gets killed on sight.
till closeNine rules. Written sober, enforced drunk.
You define them when you're calm. They lock at market open — the version of you that wants to "just widen the limit" at 11:40 doesn't get a vote. The free trial ships the three core guards; the six discipline rules switch on with any plan.
Max daily loss TRIAL
Account-level P&L guard — not a per-trade stop loss. Realized + unrealized, computed from live broker data every few seconds.
Trade ceiling TRIAL
Counts executed orders. Trade #7 never happens, and neither does the revenge spiral it was going to start.
Daily kill time TRIAL
A hard stop at an exact IST time, every trading day — because the afternoon is where discipline goes to die.
Profit lock & trailing lock PRO
Hit your number and the day ends green. The trailing lock ratchets a floor under a good morning so you can't give it all back.
Tilt detector PRO
A burst of rapid-fire trades is the signature of revenge trading. Six trades in ten minutes? The spiral is killed while it's still cheap.
Weekday & event-date kills PRO
Thursday expiry, Budget day, RBI policy — pre-load the calendar once. Time rules fire on the clock even if your P&L looks fine.
Re-activation cooldown PRO
After a kill, activating again stays blocked while you cool off. Only the override PIN — held by someone else — unlocks it early.
The override PIN PRO
Want to stop monitoring mid-session? You'll need the PIN. Give it to your spouse or mentor and your discipline gets a second signature — they're alerted if it's ever used. Without a plan there is no PIN — and no way to stop mid-session.
What does tilt cost you?
No imaginary testimonials here. Drag the sliders — your history, your math.
Illustrative arithmetic on your inputs — not a prediction, promise or past performance.
Cheaper than one bad candle.
Every paid plan gets everything — all nine rules, all six brokers, Telegram alerts, full audit trail. You're only choosing how long the guard stays on duty.
MONTHLY
- All 9 kill rules — the 6 pro rules unlock
- Fyers · Upstox · Zerodha · Angel One · Dhan · Groww
- Telegram alerts + accountability partner
- Server-side enforcement · full audit log
QUARTERLY
- Everything in Monthly
- One renewal a quarter
- Rate locked for the term
YEARLY
- Everything in Monthly
- Priority support
- One bad day pays for it 3× over
🔐 Secured by Razorpay · UPI first (app opens on mobile · scan QR on desktop) · Cards / NetBanking too · One-time plans never auto-debit · Optional autopay you can cancel any time
Prefer to test-drive first? Every signup starts with 7 free days automatically — buying just skips the wait and unlocks the pro rules.
The parts other tools whisper.
A risk product you can't interrogate is a risk. Ask us the hard ones.
Can you truly block my trading?
Only on Dhan. After a kill on Dhan we flip its official Kill Switch, which blocks new orders for the day. Fyers, Upstox, Zerodha, Angel One and Groww expose no "disable account" API — there we keep watching after the kill and cancel + flatten anything new within seconds. A tripwire that never sleeps; a padlock only where the broker allows one.
What if your server goes down?
Then monitoring is down — we alert you instead of pretending otherwise. On Fyers we also set a broker-side exit trigger as a backstop, so your P&L guard survives even our own outage. The other brokers have no equivalent; we tell you that plainly.
Do you see my broker password?
Never. You log in on your broker's own page (Fyers, Upstox, Zerodha, Angel One) or paste the day's token you generated yourself (Dhan, Groww). We store only that day-token, AES-256-GCM encrypted; every Indian broker expires it daily, so you log in each morning. Deleting your account deletes the vault entry.
Is this investment advice?
No. KaatDo is a technology tool — no calls, no tips, no portfolio views. It executes the rules you wrote, and exits can slip in fast or illiquid conditions. Keep watching your positions with your broker.
How does this sit with the 2026 retail-algo rules?
KaatDo never places an entry — it only cancels and exits, through your own broker API app, from a static IP registered to you alone, using protected limit orders (no market/IOC). We are reviewing the NSE framework with counsel; if the rules require a different setup, we tell you before it affects you, not after.
How do I know it fired?
Telegram, instantly — link the bot once. Kill fired, account flat, exit failed, token stale at 08:45, plan expiring: every one of them lands on your phone (and your accountability partner's, if you add one). A kill switch that flattens you silently isn't finished; ours tells you.
Active in three moves.
Link your broker
Fyers, Upstox, Zerodha, Angel One, Dhan or Groww — official broker login or your own daily token, never your password. Tokens renew each trading morning — one click with your coffee.
Write your rules
Loss cap, kill time and trade ceiling in the trial; profit lock, trailing lock, tilt detector, calendar kills and cooldown on any plan. Set an override PIN and hand it to someone who loves your capital.
Start the watch
The engine polls, listens and logs from the server side. You trade; it holds the line at exactly where you drew it.