Index: binaries/data/mods/public/simulation/helpers/TraderGain.js
===================================================================
--- binaries/data/mods/public/simulation/helpers/TraderGain.js
+++ binaries/data/mods/public/simulation/helpers/TraderGain.js
@@ -38,9 +38,10 @@
 	// Calculate ordinary Euclidean distance between markets.
 	// We don't use pathfinder, because ordinary distance looks more fair.
 	let distanceSq = firstMarketPosition.distanceToSquared(secondMarketPosition);
+	let cmpTerrain = Engine.QueryInterface(SYSTEM_ENTITY, IID_Terrain);
 	// We calculate gain as square of distance to encourage trading between remote markets
 	// and gainMultiplier corresponds to the gain for a 100m distance
-	gain.traderGain = gainMultiplier * distanceSq / 10000;
+	gain.traderGain = gainMultiplier * distanceSq / ( 10 * cmpTerrain.GetMapSize() );
 
 	gain.market1Owner = cmpMarket1Player.GetPlayerID();
 	gain.market2Owner = cmpMarket2Player.GetPlayerID();