Placing Trades

This guide walks you through buying and selling positions on Opinio markets.

Before You Trade

Make sure you have:

1. ✅ Connected your wallet

2. ✅ Deposited USDC into your account

3. ✅ Found a market you want to trade

The Order Panel

On any market page, you'll find the Trade panel on the right side. This is where all trading happens.

Buy vs Sell Tabs

• Buy - Purchase new positions

• Sell - Sell positions you already own

How to Buy

Step 1: Choose Your Side

Two buttons show your options:

• YES (green) - You think the event WILL happen

• NO (red) - You think the event WON'T happen

Each button shows the current price per vote.

Step 2: Enter Your Amount

Enter how much USDC you want to spend:

• Type any amount in the input field

• Or use quick-select buttons: $10, $25, $50, $100

• Your available balance is shown for reference

Step 3: Review the Quote

Before confirming, you'll see:

Field	Description
You pay	Total USDC amount (includes 1% fee)
Price per vote	Average cost for each vote
You receive	Number of votes you'll get
To Win	Maximum payout if your side wins
Potential return	Percentage gain if you win

Step 4: Confirm the Trade

Click the Buy YES or Buy NO button to execute your trade.

Your balance updates immediately and your position appears in your Portfolio.

Understanding Your Quote

Votes Explained

When you buy, you receive "votes" - think of these as shares in your prediction:

• Each winning vote is worth $1 when the market resolves

• If you buy 100 votes at $0.60, you pay $60 but win $100 if correct

• That's a potential 66.7% return!

Fee Structure

Opinio charges a 1% fee on all trades:

• Included in your "You pay" amount

• Goes towards platform operation and creator rewards

• If you used a referral code, you get a 10% discount (0.9% effective fee)

Price Impact

Larger trades may move the price:

• Small trades: minimal impact

• Large trades: you'll see higher average price

• The quote shows your exact average price

How to Sell

Already have a position? You can sell it anytime before the market resolves.

Step 1: Go to the Sell Tab

Click the Sell tab in the Trade panel.

Step 2: Select Your Position

If you hold votes in this market, they'll be displayed with:

• Number of votes owned

• Current value

• Profit/loss since purchase

Step 3: Choose Amount to Sell

Enter how many votes you want to sell (or click Max for all).

Step 4: Review and Confirm

Check the quote showing:

• How much USDC you'll receive

• The sale price per vote

• Any fees deducted

Click Sell to execute.

Trading Tips

Start Small

New to prediction markets? Start with smaller amounts to learn how pricing works.

Watch the Odds

Price changes reflect new information. If price moves against you, consider:

• Did something change fundamentally?

• Is this a buying opportunity?

• Should you cut losses?

Consider Time

Markets can be volatile as resolution approaches. Factor in:

• How much time until resolution

• Likelihood of price-moving news

• Your conviction level

Don't Overtrade

Fees add up. Make deliberate trades based on real insights, not impulse.

Common Scenarios

"I think YES is undervalued"

Buy YES. If you're right and price rises, you can sell for profit or hold until resolution.

"I want to lock in profit"

Sell your winning position now to secure gains. Don't risk reversal.

"I was wrong"

Sell to cut losses. It's better to lose 20% than 100%.

"New information changed things"

Reassess your position. Markets adjust to news - be ready to adapt.

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Next: Understanding Odds & Pricing →