What Is a Bid-Ask Spread, and How Does It Work in Trading?

4 min read Updated Apr 08, 2025

Bid-Ask Spread Explained: Unlocking Profitable Crypto Arbitrage with Arbified

The bid-ask spread is one of the most overlooked yet powerful concepts in cryptocurrency trading—and it holds even more significance in the world of arbitrage. If you're navigating through exchanges and looking to turn price discrepancies into profit, understanding how the bid-ask spread works is not optional—it's essential.

In this guide, we’ll unpack the mechanics of bid-ask spreads, explain why they matter in arbitrage, and show you how to leverage Arbified to identify profitable trades with minimal risk.

What Is the Bid-Ask Spread?

The bid-ask spread is the difference between the highest price a buyer is willing to pay (bid) and the lowest price a seller is willing to accept (ask) for an asset.

Let’s say you're trading Bitcoin:

  • Bid price on Exchange A: $105,000
  • Ask price on Exchange A: $105,010
  • Spread: $10

That $10 gap is what we call the bid-ask spread. Even though it looks small, in arbitrage—especially at scale—it can mean the difference between profit and loss.

Why Does the Bid-Ask Spread Exist?

The spread reflects the market’s liquidity and the balance between supply and demand. Tight spreads indicate strong competition between buyers and sellers. Wider spreads usually point to lower liquidity or increased uncertainty.

Influencing Factors:

  • Liquidity: Highly traded assets like BTC or ETH usually have narrow spreads.
  • Volatility: In volatile conditions, spreads widen to account for price swings.
  • Exchange Volume: Major exchanges often have tighter spreads due to higher trading volume.

The Bid-Ask Spread in Arbitrage Trading

In crypto arbitrage, you're not just buying low and selling high—you’re doing it across different exchanges. The spread becomes a crucial piece of the puzzle when determining whether a trade is worth executing.

Example Scenario:

  • Buy ETH on Exchange A for $3,398
  • Sell ETH on Exchange B for $3,405
  • Theoretical profit: $7

Sounds great, right? But wait.

If:

  • Exchange A has a spread of $5
  • Exchange B has a spread of $6

That $7 profit can quickly evaporate into a loss once the spreads are factored in. That's why arbitrage traders mustevaluate spreads carefully before executing trades.

How Arbified Optimizes Spread-Based Arbitrage

This is where Arbified becomes your edge. The platform isn’t just a scanner—it’s a full-suite arbitrage assistant that:

✅ Scans dozens of exchanges in real-time
✅ Displays bid and ask spreads across all major pairs
✅ Highlights only net-profitable opportunities after considering spreads, fees, and liquidity
✅ Assigns a liquidity score so you know how much you can trade without slippage

No more second-guessing if a spread-based trade is worth it. Arbified does the math and filters out the noise.

Managing Bid-Ask Spreads Like a Pro

To master arbitrage, you need more than just a good scanner. Here are some best practices to help you make informed, profitable decisions:

1. Stick with High-Liquidity Assets

BTC, ETH, XRP, and other top coins usually have tight spreads and high volume. This makes them ideal for arbitrage, especially when using automated tools.

2. Use Limit Orders Strategically

While market orders execute instantly, they may be filled at less favorable prices. Use limit orders to control execution price and reduce spread loss.

3. Monitor Spreads in Real-Time

Spreads fluctuate rapidly. Arbified’s live data feed ensures you're not making decisions based on outdated numbers.

4. Avoid Thinly Traded Pairs

Low-volume altcoins might have juicy price gaps, but they come with wide spreads and higher slippage risk. These are traps for inexperienced traders.

Practical Arbitrage Example with Spread Analysis

Let’s simulate a real arbitrage opportunity:

On Exchange A:

  • ETH Ask: $3,400
  • ETH Bid: $3,395
  • Spread: $5

On Exchange B:

  • ETH Ask: $3,392
  • ETH Bid: $3,398
  • Spread: $6

If you buy ETH at $3,392 on Exchange B and sell it at $3,395 on Exchange A, your theoretical profit is $3 per ETH. But after accounting for spreads and network fees, the opportunity might not be profitable—unless you're using a tool like Arbified that already filters out poor-margin trades.

Final Thoughts: Make Spreads Work for You, Not Against You

The bid-ask spread is both a barrier and an opportunity in arbitrage. Smart traders use it as a filter to identify trades with real profit potential—not illusions.

With Arbified, you gain more than just visibility—you get an intelligent platform that breaks down spreads, evaluates liquidity, and highlights only those trades where the math works in your favor.

Start trading smarter. Start with Arbified.


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