BybitMinOrderSize

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Bybit Order Quantity Compliance Library

This library provides all utility functions required for TradingView strategies
that execute orders on Bybit via webhooks.

Problem:
Bybit enforces two strict rules on every order submitted:

1. Minimum Order Size – each symbol has its own minimum quantity.
   
2. Quantity Precision– each symbol requires rounding to the correct number of decimals.
   

TradingView does not expose this metadata, so strategies can easily submit
quantities that Bybit rejects as invalid.

Solution (This Library):
This library embeds full Bybit contract metadata, including:

• A complete mapping of Bybit symbols → minimum order size
• A complete mapping of Bybit symbols → allowed precision (decimal places)
• A helper to normalize tickers (removing `.P` suffix for Bybit perpetuals)
  

It also exposes utility functions to automatically make your quantities valid:

• `normalizeTicker()` — removes `.P` for consistent lookup
  
• `getMinOrderSize()` — returns the correct minimum order size
  
• `getPrecisionForTicker()` — returns required quantity precision
  
• `floorQty()` — floors quantities to valid minimum increments
  
• `roundQty()` — rounds quantities to valid decimal precision
  

Use Cases:

• Ensuring webhook strategies never send too-small orders
  
• Rounding limit/market orders correctly before execution
  
• Making Pine strategies execution-accurate for Bybit
  
• Avoiding "order rejected: qty too small / invalid precision" errors
  

This library is recommended for:

• Live trading via TradingView → Bybit webhooks
  
• Backtesting strategies that simulate real Bybit constraints
  

Source: bybit.com/en/announcement-info/transact-parameters/
Updated: 2025-11-25 — Bybit contract metadata

normalizeTicker(symbol)
  Normalizes Bybit perpetual tickers by removing the ".P" suffix.

precisionFromMinOrder(minOrder)
  Derives precision (decimal places) from minimum order size.

getMinOrderSize(symbol)
  Retrieves the minimum order size for the current or given symbol.

getPrecisionForTicker(symbol)
  Retrieves the required quantity precision (decimal places) for a given Bybit symbol.

floorQty(qty, symbol)
  Rounds a quantity down to the nearest valid minimum order size for a given symbol.

roundQty(qty, symbol)
  Rounds a quantity to the valid precision for the specified symbol.

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Notes de version

Changelog v2.0:

1. Performance: `floorQty` and `roundQty` now accept optional `minOrderSize` and `precision` parameters respectively.
   
2. Optimization: Strategies can now pass cached or user-defined values to skip redundant internal lookups on every call.
   
3. Compatibility: Fully backward compatible; defaults to automatic lookup if optional parameters are omitted.
   
4. //