Fees & FX Methodology
Last updated: 2 October 2025 (Europe/Warsaw)
This page explains how prices, FX, and fees are formed (methodology). Numbers and specific rates may vary by pair, liquidity, and risk.
1) Pricing components
- Reference rate (mid): blended from reputable market data sources (e.g., multiple aggregators/liquidity venues).
- Spread / margin: markup applied to cover liquidity, volatility, and operational risk. Spread can differ by asset/pair, size, and risk profile.
- Network fee: blockchain fee required for the payout transaction; varies by network conditions.
- Processing fees: card/payment processor fees where applicable.
- Rounding & quote validity: quotes are rounded to supported decimals and valid for a short window to reduce slippage.
2) Indicative formula (no numbers)
For a pair BASE/QUOTE:
- mid = blend( sources[BASE/QUOTE] ) (weighted average, with fallbacks)
- price_quote = mid × (1 + spread%)
- Final amount you pay/receive = price_quote × size ± network_fee ± processing_fee
Where applicable, cross-currency FX is applied before spread.
3) Execution & updates
- Quotes refresh frequently and may be frozen for a brief time once you confirm an order.
- In abnormal markets (low liquidity/high volatility), quotes may be paused or recalculated.
4) Visibility
- We show the pair, direction, quote, validity window, and an estimate of network fees before you confirm.
- After execution, you see a receipt with the parameters used.
Questions? Contact billing@bigstarpay.com