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4pass

Multi-Broker Automated Trading Platform

One platform. Multiple markets. Start free.
4pass connects TradingView alerts to your brokers for automated order execution—Taiwan, crypto, and US (planned)—with no desktop install and no upfront license. Built for scale and security so you focus on strategy, not infrastructure.

10K+ Concurrent Users Supported

897ms Worker Startup (Pool Claim)

96.6% Gross Margin at Scale

37 Technical Indicators

~80 Terraform-Managed Resources

5 Security Layers

Platform Overview

4pass is a multi-broker automated trading platform that enables retail and institutional traders to automate their strategies across multiple markets and brokers through a single unified interface.

graph LR
    TV["TradingView<br/>Alerts"] -->|Webhook| API["FastAPI<br/>API Layer"]
    UI["Vue.js<br/>Dashboard"] -->|REST API| API
    API -->|SQS FIFO| Lambda["Lambda<br/>Orchestrator"]
    Lambda -->|RunTask / Pool Claim| Worker["ECS Worker<br/>(Per-User)"]
    Worker -->|SDK| Broker["Broker APIs<br/>Shioaji · Gate.io"]
    API -->|Read/Write| DB["RDS Aurora<br/>PostgreSQL"]
    API -->|Queue + State| Redis["ElastiCache<br/>Valkey"]
    Worker -->|Queue + Heartbeat| Redis

What Makes 4pass Different

Capability Implementation Advantage
Multi-Market Coverage Taiwan futures/options + Crypto (BTC/USDT perpetuals) + US markets (planned) Single platform for ~20 hr/day market coverage
Per-User Isolation One ECS task per user with dedicated broker connection Zero cross-user interference; fault isolation
Sub-Second Startup SQS pool-claim from pre-warmed workers: 897ms end-to-end Users never wait for infrastructure
Visual Strategy Builder Vue Flow canvas → PineScript v6 code generation No-code strategy creation with full PineScript power
Realistic Backtesting Magnifier technique: intra-bar execution on higher timeframes Avoids the "bar-close fill" illusion
Enterprise Security RSA-4096 + AES-256-GCM + AWS KMS HSM Private keys never leave FIPS 140-2 Level 3 hardware
Serverless Orchestration 5 Lambda functions + 3 SQS queues Zero single points of failure; unlimited scaling
Infrastructure as Code ~80 Terraform-managed AWS resources Reproducible; scaling is a tfvars change

Why Traders & Teams Choose 4pass

  • Start free, upgrade when ready — Basic tier includes simulation and strategy builder; no credit card required to try. Pro (NT$999/mo) unlocks real trading across all supported markets.
  • One subscription, multiple markets — Taiwan futures/options, crypto perpetuals, and (soon) US equities from a single dashboard. No need to juggle separate tools or pay per market.
  • TradingView-native — Use the charts and Pine Script you already know. Alerts hit 4pass in under a second; your broker receives the order with per-user isolation and full audit.
  • Built for professionals and teams — Roadmap includes one webhook → multiple accounts (B2B/asset managers), in-app backtest, and native strategy execution so you can rely less on third-party platforms.
  • Security you can trust — Credentials encrypted with keys in AWS KMS (FIPS 140-2 Level 3). WAF, rate limiting, and audit logs are standard so you and your clients stay protected.

Want the full picture? See Cost & competitive analysis and the roadmap.

Architecture at a Glance

graph LR
    subgraph clients["Clients"]
        TV["TradingView"]
        UI["Dashboard"]
    end

    subgraph api["API Layer"]
        ALB["ALB + WAF"]
        FastAPI["FastAPI Routers"]
    end

    subgraph orchestration["Orchestration"]
        SQS["SQS FIFO"]
        Lambda["Lambda x5"]
    end

    subgraph workers["Workers"]
        W["ECS Tasks<br/>Per-User"]
    end

    subgraph brokers["Brokers"]
        B["Shioaji · Gate.io · Mock"]
    end

    subgraph data["Data"]
        Valkey["Valkey"]
        RDS["Aurora + Proxy"]
        KMS["KMS"]
    end

    TV --> ALB --> FastAPI
    UI --> ALB
    FastAPI --> SQS --> Lambda --> W --> B
    FastAPI --> RDS
    FastAPI --> Valkey
    W --> Valkey
    FastAPI --> KMS

Documentation Sections

Architecture

System architecture designed for 10K+ concurrent users. ECS EC2 Capacity Providers, Lambda orchestration, managed data layer, and auto-scaling from 1 to 100K users.

Explore Architecture

Design

Visual strategy builder, PineScript v6 compiler, magnifier backtesting engine, multi-broker abstraction with factory auto-discovery, and the complete order execution lifecycle.

Explore Design

Security

Defense-in-depth with 5 security layers: transport, end-to-end encryption, authentication, webhook validation, and WAF. Real-time attack detection with email alerts.

Explore Security

Cost Analysis

Summary & pricing, infrastructure breakdown, projections to 100K users, optimization strategies, and competitive analysis (Taiwan + global). 96% gross margin; breakeven at 15 users.

Explore Costs

DevOps

Three GitHub Actions CI/CD pipelines, multi-stage Docker builds, optimized 254 MB worker image, rolling ECS deployments with health verification, and OIDC authentication.

Explore DevOps

Future Roadmap

Overview by dimension (Infrastructure, System Architecture, System Features & Product, DevOps), timeline, and the path to 100K users.

Explore Roadmap

Supported Markets

00   02   04   06   08   10   12   14   16   18   20   22   24  (UTC+8)
├─────────────────────── Crypto 24/7 ────────────────────────────────┤
├── TW Night ──┤                    ├──── TW Night Session ────────┤
                        ├── TW Day ──┤
                                                 ├── US Market ────┤

Effective coverage: ~20 hours/day across all markets
Market Broker Status Instruments
Taiwan Futures & Options Shioaji (SinoPac) Production TAIEX Futures, Options
Cryptocurrency Gate.io Production BTC Perpetuals, USDT Perpetuals
US Stocks & Futures TBD Planned Equities, Index Futures

Technology Stack

Layer Technology Purpose
Frontend Vue 3, Tailwind CSS, Vue Flow Dashboard, strategy builder
API FastAPI, Gunicorn, Uvicorn REST API, webhook handler
Compute ECS EC2 Capacity Provider API service + per-user workers
Orchestration Lambda, SQS FIFO, EventBridge Worker lifecycle, task dispatch
Cache / Queue ElastiCache Valkey Serverless Redis-compatible; queues, state, sessions
Database RDS Aurora PostgreSQL + Proxy Users, orders, credentials, audit
Encryption KMS, AES-256-GCM, RSA-4096 End-to-end credential protection
Networking ALB, WAF, VPC, Route 53 HTTPS, DDoS protection, DNS
IaC Terraform (~80 resources) Reproducible infrastructure
CI/CD GitHub Actions, ECR, ECS Automated deployment pipeline
Backtesting vectorbt, pandas, numpy Signal-based portfolio simulation
Compiler Custom PineScript v6 parser Strategy → vectorized Python

Get Started

Step Action
1 Sign up and create an account at 4pass.io.
2 Link your TradingView alerts to your 4pass webhook URL (see Webhook Security).
3 Connect a broker (Shioaji or Gate.io); credentials are encrypted and never leave our secure layer.
4 Run in simulation first, then switch to real trading when you’re ready.

Questions or feedback? We’d love to hear from you: luisleo52655@gmail.com.

4pass — Automated trading for every market.

Contact: luisleo52655@gmail.com