What to know
- You must construct a Marketplace before trading becomes available
- Trading is accessed through the city interface using the exchange icon
- You can swap any resource types depending on availability
- Rates vary, so trading smartly is essential for efficiency
Managing resources efficiently in Heroes of Might and Magic: Olden Era can define whether your campaign thrives or struggles. Whether you are short on gold, wood, ore, or rare materials, knowing how to buy and sell resources properly gives you flexibility and control over your strategy. This guide walks you through the exact process step by step while also helping you understand the deeper mechanics behind trading.
Marketplace in Heroes of Might and Magic Olden Era
Before you can trade anything, you need to construct a Marketplace in one of your cities. This building unlocks the entire trading system and allows you to convert surplus materials into what you actually need.

Without a Marketplace, your excess resources remain locked and unusable for strategic adjustments. Once built, every city with a Marketplace contributes to better trading rates, making expansion even more valuable.
| Feature | Details |
|---|---|
| Requirement | Marketplace building |
| Access Point | City interface (Exchange Resources icon) |
| Trade Type | Resource-to-resource exchange |
| Control | Adjustable slider for quantity |
| Key Factor | Variable exchange rates |
How to access the resource exchange interface
Double-click on any city you control from either the main map or the right-hand panel. This opens the city interface where all management actions take place.

Locate the Exchange Resources icon, typically represented by a treasure chest, on the right-hand side. Clicking this will bring up the trading interface.
This interface is your central hub for all buying and selling actions.
How to buy and sell resources in Heroes of Might and Magic
Select the resource you want to receive on the right side of the interface. This represents what you are buying. Choose the resource you are willing to give up on the left side. This acts as your payment.

Use the slider in the center to adjust how much you want to trade. The interface will automatically calculate the exchange rate.
Click the confirmation button at the bottom center to finalize the trade. Once confirmed, the resources are instantly updated.

This system allows full flexibility, letting you react quickly to shortages during gameplay.
Understanding fluctuating trade rates and city advantages
Not all trades are equal, and this is where strategy comes into play. The exchange rate depends on several factors, including how many Marketplaces you own across your cities.

Cities with more Marketplaces generally offer better rates, meaning you lose fewer resources during trades. This encourages expansion and infrastructure development rather than relying on a single city.
You should always check rates before confirming a trade to avoid unnecessary losses. Over time, inefficient trading can significantly slow down your progression.
Strategic tips for trading in Olden Era
Trading should not be your first solution—it should be your backup plan. Ideally, you want to gather resources naturally through map control, mines, and exploration.
However, when needed, smart trading can help you rush key buildings, recruit units faster, or recover from setbacks. Timing matters, especially when preparing for battles or upgrading your army.
Avoid trading rare resources unless absolutely necessary, as they are often harder to obtain and more valuable for advanced structures.
Mastering resource trading in Heroes of Might and Magic: Olden Era gives you a strong economic edge that can decide entire matches. By building Marketplaces early, understanding exchange rates, and trading only when necessary, you can maintain a balanced and efficient economy throughout your campaign.
If used wisely, the trading system becomes a powerful tool rather than a costly habit.