2026.08.30 - Add Market Cap Chart Mode to WebSocket OHLCV Subscriptions

Expand WebSocket OHLCV subscriptions with a new chartBy selector so clients can receive OHLCV candles by token price or by market cap. WebSocket - Subscribe OHLCV Token/Pair OHLCV

Features

Add chartBy to OHLCV subscriptions
Support price and mcap as valid chartBy values
Default chartBy to price when omitted
Support market cap OHLCV output for token subscriptions on Solana
Fall back to price-based OHLCV if token supply is unavailable
Keep existing OHLCV subscription behavior unchanged for clients that do not send chartBy

Parameters

Parameter	Type	Required	Default	Description
`chartBy`	string	No	`price`	Select OHLCV display mode: `price` or `mcap`. `mcap` applies to token OHLCV on Solana and falls back to `price` if supply is unavailable.

Compatibility Note

Existing clients continue receiving price-based OHLCV data without any request changes
chartBy=mcap is only applicable to token OHLCV on Solana
Unsupported chartBy values are rejected