Hayaiti / Web for Trading
Charting UIs, broker dashboards, prop firm back-office, retail trading platforms. Real-time data plumbed correctly, sub-100ms render budgets, regulatory disclosures baked in.
3 recommended web development packages for Trading. Pay 50% upfront. Source code yours.
Why this combo
The decisions we made differently — and why they matter for trading specifically.
TradingView Charting Library, Lightweight Charts, Highcharts Stock — we integrate the right one for your latency + customization tradeoff. We don't try to rebuild Sharpe-ratio-grade charts from D3 because we like the challenge.
WebSocket reconnects on flaky networks, snapshot-then-delta updates, sequence-number validation, gap-fill on resume. Your trader sees a tick stream that's actually correct, not a lying-by-omission UI.
Order book updates, position blotter rerenders, P&L recalculations — all profiled and budgeted. We use canvas where DOM falls over. We don't ship a React app that re-renders 50 components per tick.
Prop firms and brokers serve traders running 5-20 accounts. We design account selectors, position aggregation views, and per-account risk indicators that don't trick a trader into placing the right order on the wrong account.
Risk warnings on every order ticket, annotated past performance, jurisdiction-aware leverage caps, retail-vs-pro disclosures. Our compliance-surface playbook covers FCA, ASIC, and US-broker-equivalent jurisdictional patterns — your compliance lawyer drafts the words; we put them in the right place.
Account onboarding queues, KYC document review, payout approvals, P&L exports, audit logs. The internal tools your ops team lives in matter as much as the trader-facing UI — we ship both.
Industry context
of US equity volume executed by algorithmic trading systems
JPMorgan Markets Research 2023
estimated retail trading accounts globally as of 2023
BIS + industry composite (Robinhood, Schwab, IBKR, etc. quarterly disclosures)
Hayaiti Web App MVP — auth + dashboard + real-time data integration, 30 days
Hayaiti Custom API — broker integrations + market-data normalization + webhooks, 28 days
Why Hayaiti
Trading web UIs sit at the intersection of three hard problems: real-time correctness, regulatory exposure, and trader trust. Get the data plumbing wrong and traders see stale prices. Get the disclosures wrong and your compliance officer pulls the product. Get the UX wrong and traders place the wrong order. The build playbook covers broker dashboards, charting interfaces, and back-office tools — including which battles to fight in canvas vs DOM, when to use TradingView vs Lightweight Charts, and how to wire WebSocket reconnects so your traders don't see staleness during the open. We are NOT a registered broker-dealer, NOT an FCA-regulated firm, NOT compliance counsel — we are the engineering layer underneath the regulatory wrapper.
Recommended packages
The web development packages that fit trading engagements best. Fixed price, fixed timeline, source code yours.
Most trading projects start with Web App MVP, then Internal Tool / API.
Auth, database, dashboard, payments. Ship-ready Next.js app.
delivered in 30 days
50% upfront · final 50% on delivery · source code yours
Custom API + admin UI. Auth, audit logs, role-based access.
delivered in 4 weeks
50% upfront · final 50% on delivery · source code yours
Need something custom? See all SKUs or email us.
Shape of work
A small fintech needed to connect their internal book to a clearing broker's API and reconcile positions, cash, and corporate actions every night without manual intervention. Their existing approach was a CSV download + Excel macro maintained by one person.
Spec engagement built to set the bar — same playbook a real client gets. Real cases publish after launch with the client’s sign-off.
FAQ
Yes — the playbook covers both the open Lightweight Charts (free, MIT-licensed) and the licensed TradingView Charting Library (the full one with all studies). The licensed one requires a contract with TradingView; we can help you scope that conversation. For most retail-trading dashboards, Lightweight Charts is plenty.
Equities/options: Interactive Brokers (TWS / Gateway / Web API), Alpaca, Tradier, Tradovate, IEX Cloud, Polygon. Crypto: Coinbase Advanced, Binance, Bybit, Hyperliquid, OKX, dYdX. We've also normalized FIX feeds when needed. Each integration ships with idempotent order submission and a reconciliation job.
Yes. The hard part is per-asset session calendars, per-asset cost models, and per-asset margin/risk semantics. We don't pretend everything is SPY — equities have a 9:30-16:00 session, futures roll over, options have Greeks, crypto is 24/7. The data model and UI both have to respect that.
No. Sub-millisecond HFT and market-making infrastructure is a different engineering discipline (kernel-bypass NICs, FPGA, co-location). We're great for daily-to-intraday algo dashboards (5min+ bars) and broker UIs. For HFT, we'll refer you out.
Yes — your compliance team drafts the language; we wire it into the right places (order tickets, leverage selectors, performance summaries, jurisdiction filters). We've worked under FCA, ASIC, and US-broker-equivalent surfaces. We are NOT compliance counsel — we don't sign off on wording.
Variable, and significant. Real-time US equity data via Polygon is $200-2,000/mo+ depending on tier. IEX Cloud is cheaper but limited. Crypto is generally free via WebSocket. We'll architect to minimize data spend (snapshot-then-delta, server-side caching for slow consumers) but the underlying data feed cost is yours.
Yes — mutual NDA, sent as PDF before the first technical call. Standard for trading-platform work; we don't share architecture, broker mappings, or your competitive surface with anyone.
Start with an audit, or jump straight to pricing. Either way, you talk to engineers — not a sales funnel.