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Scalping Strategies

Spread Capture Techniques

Overview

Spread capture (also called 'scalp the spread') involves placing limit orders on both sides of the bid-ask spread to earn the spread difference. In liquid markets with tight spreads, high-frequency traders and skilled scalpers use this technique to accumulate small profits from market-making activity. This requires the fastest execution and minimal latency.

Key Concepts

Post limit orders at the bid and ask, Profit from the spread difference when both sides fill, Requires extremely tight spreads (1-2 ticks maximum), Queue position matters — first in queue at a price level fills first, Inventory management: must actively hedge or flatten when one-sided exposure builds

Entry Signals

Place limit buy at current bid, limit sell at current ask, In markets with 1-tick spreads and high volume, Fill on one side, immediately work the other side, Cancel unfilled orders quickly if market moves against you

Exit Signals

Target: the spread (1-2 ticks per round trip). Stop: immediate exit if caught wrong-sided by more than 3-4 ticks. Time: exit all positions within seconds to minutes.

Best Timeframes

Tick-by-tick. This is not chart-based trading — it's order-book based.

Pro Tips

True spread capture is dominated by HFT firms with colocation and sub-millisecond execution. Retail traders can approximate this in slower markets but need to be extremely disciplined about inventory management.