What Is a Daily Loss Limit (and Why Willpower Alone Doesn't Enforce One)
A daily loss limit is a simple rule: decide, in a calm moment, the most you're willing to lose in a single trading session — then stop the moment you hit it. Every experienced trader already knows this rule. Prop firms like Topstep and Tradovate build it directly into their platforms because the data is consistent: a single undisciplined day, not a single bad trade, is what actually blows up most trading accounts.
The problem was never awareness. The problem is that the decision to "stop for today" has to be made by the same brain that just took a loss and wants to win it back immediately — and that brain is, for a few critical minutes, not the one you trust to follow your own rules.
Why a Browser Extension Instead of Just "Being Disciplined"
Daily Loss-Limit Lockout takes the decision out of your hands at the exact moment you're least equipped to make it. You set the limit once, before the trading day starts. If you hit it, your trading platforms get physically locked out of your browser — not a notification you can dismiss, not a popup you can click past without thinking.
Key Trader Pain Points and How This Extension Solves Them
| Pain Point | How Daily Loss-Limit Lockout Solves It |
|---|---|
| Traders know their loss limit but override it "just this once" after a bad trade | The lock triggers automatically the moment your logged loss reaches the limit — no manual step to skip |
| Revenge trades have dramatically lower win rates and larger average losses than normal trades | Hard lock mode removes the option to place the next trade at all, for the rest of the session |
| Prop-firm daily loss limits are locked to that firm's own platform | Works across any broker or platform you add to your blocklist — TradingView, brokerage sites, futures platforms |
| Existing "site blocker" extensions have no concept of P&L or dollar limits | Tracks your actual logged losses against a real $ or % limit, not just a timer |
| No record of when or why discipline broke down | Every lockout is logged with date, time, and trigger reason for later review |
How the Daily Loss-Limit Lockout Extension Works
The flow is the same every trading day: set your limit once, log trades as they close, and let the extension handle the stopping decision for you.
Step 1 — Install and Open Settings
After installing, click the extension icon and choose Settings. This is where every rule lives — you only need to configure it once per strategy change, not every day.
Step 2 — Set Your Daily Loss Limit
Choose between two input modes:
Dollar Mode
Enter a fixed amount in USD ($) — for example, $200. This number never changes day to day unless you edit it yourself.
Percent Mode
Enter a percentage of your account balance — for example, 2% — plus your current starting balance ($). The extension recalculates the dollar equivalent automatically at the start of each session.
200 or 199.50). Percent fields accept values between 0.1 and 100. The extension validates that percent-mode entries always have a starting balance greater than zero before saving — an empty or zero balance will not calculate a valid limit and the setting won't save.
Step 3 — Add Your Trading Platforms to the Blocklist
The lockout screen only appears on domains you've explicitly added — nothing is blocked by default. Type a domain (e.g. tradingview.com) or use a one-click preset for common platforms.
tradingview.com, not https://www.tradingview.com/chart. The extension strips protocols and "www." automatically, but a full URL with a path attached will not match correctly.
Step 4 — Choose Your Lock Mode
Hard Lock
No override, no exceptions, until your next scheduled reset. Recommended if you know from experience that any override button becomes an override you always press.
Soft Lock
Shows a full-screen warning with a deliberate delay (default 10 seconds) before a "continue anyway" option appears. The delay itself is the point — it interrupts the impulse without removing your agency entirely.
Step 5 — Log Trades as You Close Them
Open the popup and enter the realized P&L of each closed trade — Log Loss for a losing trade, Log Win for a winning one. Wins reduce your cumulative loss and reset any consecutive-loss streak.
Step 6 — What Happens When You Hit Your Limit
The moment your cumulative logged loss reaches your limit, every blocklisted site currently open — and any you open afterward — shows the lockout screen immediately, without needing to refresh the page.
Worked Example — A Full Trading Day Walkthrough
Here's exactly how the numbers move through a real session, using dollar mode with a $200 daily limit.
7:00 AM — Daily limit set to $200. Session begins with $200 of remaining allowance.
9:45 AM — First trade closes at a $60 loss. Logged. Remaining allowance: $140.
10:20 AM — Second trade closes at a $45 win. Logged. Remaining allowance: $140 (unchanged — a win doesn't add to the limit, it only offsets prior losses if trailing mode is enabled).
11:05 AM — Third trade closes at a $110 loss. Logged. Cumulative loss now $170. Remaining allowance: $30.
11:40 AM — Fourth trade closes at a $35 loss. Cumulative loss reaches $205 — over the $200 limit.
11:40:01 AM — Lockout triggers instantly. Every blocklisted platform shows the lockout screen. In hard-lock mode, no override exists until the next scheduled reset.
Try It: Remaining Allowance Calculator
Enter a daily limit and a cumulative loss to see the same calculation the extension runs on every logged trade.
The underlying calculation is simple by design, so there's never ambiguity about why a lockout fired:
$$\text{Remaining Allowance} = \text{Daily Loss Limit} - |\text{Cumulative Logged Loss}|$$
Where Traders Actually Use This
Day Traders
Intraday traders taking many trades per session are the primary audience — a single bad hour can otherwise spiral into a bad week. The consecutive-loss cooldown (Pro) catches the "quiet" version of revenge trading, where setups get worse gradually rather than one dramatic oversized trade.
Swing Traders
Swing traders use it less for intraday P&L and more for capping how much gets risked across a cluster of positions opened in a short window, using percent mode tied to account balance.
Prop-Firm and Funded Account Traders
Some funded-account firms have removed their built-in daily loss limit entirely, leaving traders to self-enforce the exact discipline their evaluation depends on. This extension rebuilds that missing layer independently of whichever platform the firm uses.
A Note on Accuracy
All calculations in this extension are simple, transparent arithmetic — a subtraction and a comparison, run locally in your browser. There is no hidden estimation, no server-side processing, and no P&L data ever leaves your device. The only network call this extension makes is to verify a Pro license key against Gumroad; everything else, including every number on this page, is computed entirely offline.
Common Mistakes (and How to Avoid Them)
https://www.tradingview.com/chart/) instead of a bare domain in the blocklist.Fix: Use just
tradingview.com — the extension matches the whole domain and its subdomains automatically.
Fix: Update the starting balance field at the start of each session if your account size has changed — the percent limit recalculates from whatever balance is currently entered.
Fix: That's the intended behavior. If you want some flexibility, use soft lock instead — hard lock exists specifically for traders who've found that any override option becomes the option they always take.
Fix: Log every closed trade as it happens rather than trying to reconstruct the day's total from memory afterward — the extension has no automatic connection to your broker in this version, so accuracy depends on consistent logging.
Frequently Asked Questions
Can this extension actually stop me from trading?
It can block access to the specific sites on your blocklist while locked, but it cannot lock your broker account itself. It works as a friction device, not a technical guarantee — the same honest limitation that applies to any browser-based site blocker.
Does it automatically read my P&L from my broker?
Not in this version. You log each closed trade's result manually through the popup. This keeps the extension broker-agnostic and avoids the security risk of connecting to a live, authenticated trading session.
What's the difference between hard lock and soft lock?
Hard lock has no override at all until the next scheduled reset. Soft lock shows a warning with a delay before a "continue anyway" button appears, giving you a moment to reconsider without removing the choice entirely.
What happens to my settings after the 14-day trial?
Core features — your daily limit, blocklist, and lock mode — keep working for free indefinitely. Pro features like the consecutive-loss cooldown, trailing limit, and journal export require a Monthly Pro subscription after the trial ends.
Can I unlock early if I really need to?
In soft-lock mode, yes, after the configured delay. In hard-lock mode, no — the lock lifts automatically at your next scheduled reset time and cannot be bypassed from within the extension.
Does this work with any broker or trading platform?
Yes — you add whichever domains you trade on to the blocklist yourself, so it works with any browser-based platform rather than being locked to one broker.
