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Data feed that shows individual orders

Does anyone know how I can obtain time and sales data for a stock? Lots of feeds provide the total volume but I would like to see the breakdown of what buy/sell orders made up the day's volume. I ...
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3answers
191 views

Is it worth preserving orderbook structure when building it from individual orders?

Say I'm building an order book and two bids come in at price $p$ and volumes $v_1$ and $v_2$. Which option is better To store the order as $\{p, v_1+v_2\}$ or To store the order as $\{p,v_1\}$ and ...
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2answers
266 views

Order and position management in (semi-)automated trading system

A simple and lazy approach to implementing an order and position management (OPM) component in a (semi-)automated trading system: leave most OPM to counter party (broker/exchange). Even then funds ...