Trades data in aggregated form, known as OHLC, candlesticks, klines etc. Not only most common
time based aggregation is supported, but volume and tick count based as well. Bars are computed
from tick-by-tick raw trade data, if in given interval no trades happened, there is no bar produced.
Option summary info sourced from the options instrument channel, carrying exchange-provided
greeks, implied volatilities, mark and underlying prices, and best bid/ask for a single option.