Dual-side arbitrage in prediction markets like Polymarket looks simple:

Buy both outcomes below $1 → hold → guaranteed profit.

But in real trading, this breaks without one key component:

Risk management.

The real risk is not price direction — it’s execution imbalance.

The Real Risk: Unpaired Exposure

In theory:

Buy UP at 0.47

Buy DOWN at 0.46

Total = 0.93 → locked profit.

In practice:

One side fills

The other doesn’t

Time runs out

If the market resolves before completing the pair, you face a full loss.

So the focus must be:

Resolve imbalance, not just find price edges.

Core Risk Management Principles 1. Limit Unpaired Inventory

Never allow unlimited exposure on one side.

Track unpaired tokens and stop new buys when imbalance exceeds a threshold.

Result: Prevents runaway risk.

2. Time-Based Forced Hedging

The most important safeguard.

If the opposite side isn’t filled within a set time:

Force-buy it at a more aggressive price.

This reduces profit slightly but guarantees completion.

3. Progressive Hedging

Don’t wait for perfect fills.

As imbalance grows:

Hedge small portions early

Increase hedge size over time

Result: Avoids costly last-second execution.

4. Liquidity-Aware Execution

Not all opportunities are real.

Check:

Orderbook depth

Spread

Fill probability

If liquidity is weak, reduce size or skip.

5. Time Window Control

Markets become unstable near resolution.

Best practice:

Trade only between defined times (e.g., 300s → 90s)

Avoid late entries

Complete all pairs before final window

6. Emergency Hedging

Near market close:

Close all unpaired positions immediately.

Even if it means crossing the spread and accepting worse prices.

7. Order Escalation

Limit orders improve profit but reduce fill rate.

Use a layered approach:

Passive limit

Retry with better pricing

Aggressive fill if needed

Result: Higher completion rate.

8. Edge Validation

Not every “cheap pair” is profitable.

Before entering:

Include slippage and execution cost

Reject weak setups

9. Inventory Skew Control

When imbalance appears:

Prioritize buying the missing side

Reduce buying the dominant side

This naturally rebalances positions.

The Role of the Hedge Manager

A proper system separates hedging logic.

The hedge_manager handles:

Forced hedging

Partial hedging

Emergency closing

Execution escalation

Its goal:

Ensure every position becomes a complete pair.

Final Insight

Dual-side arbitrage is not truly risk-free.

In reality:

Fills are uneven

Liquidity disappears

Time is limited

The real edge is not finding opportunities —

It’s how effectively you neutralize risk.

A successful bot:

avoids getting stuck

resolves imbalance fast

exits fully hedged

That’s what makes the strategy work.

Contact

Email: benjamin.bigdev@gmail.com

Telegram: https://t.me/BenjaminCup

X: https://x.com/benjaminccup

GitHub: https://github.com/Gabagool2-2/polymarket-trading-bot-python