Need a little help here, no matter were I search I can't find were the prices for goods are and the chance they lower or raise, can anyone point me out the right file? :D

Nvm finally found it. Terrain folder in the CIV4YieldInfos.xml

The prices do not change enough compared to Col1. Selling one type good all the time do not lower price enough.

Can somebody explain how this works (example what following 3 lines do):
<iSellPriceDifference>
<iPriceChangeThreshold>
<iPriceCorrectionPercent>


<Type>YIELD_FOOD</Type>
<Description>TXT_KEY_YIELD_FOOD</Description>
<Civilopedia>TXT_KEY_YIELD_FOOD_PEDIA</Civilopedia>
<bCargo>1</bCargo>
<iBuyPriceLow>0</iBuyPriceLow>
<iBuyPriceHigh>2</iBuyPriceHigh>
<iSellPriceDifference>8</iSellPriceDifference>
<iPriceChangeThreshold>1000</iPriceChangeThreshold>
<iPriceCorrectionPercent>1</iPriceCorrectionPercent>
<iNativeBuyPrice>-1</iNativeBuyPrice>
<iNativeSellPrice>7</iNativeSellPrice>
<iNativeConsumptionPercent>-1</iNativeConsumptionPercent>
<iNativeHappy>0</iNativeHappy>
<iHillsChange>-1</iHillsChange>
<iPeakChange>0</iPeakChange>
<iLakeChange>2</iLakeChange>
<iCityChange>0</iCityChange>
<iMinCity>0</iMinCity>
<iAIWeightPercent>100</iAIWeightPercent>
<iAIBaseValue>5</iAIBaseValue>
<iNativeBaseValue>4</iNativeBaseValue>
<iPower>0</iPower>
<iAsset>1</iAsset>
<ColorType>COLOR_YIELD_FOOD</ColorType>
<UnitClass>UNITCLASS_FOOD</UnitClass>
<iTextureIndex>0</iTextureIndex>
<iWaterTextureIndex>8</iWaterTextureIndex>


Thanks, Dafy.

http://forums.civfanatics.com/showthread.php?t=292862

Need a little help here, no matter were I search I can't find were the prices for goods are and the chance they lower or raise, can anyone point me out the right file? :D

Yes. This is how prices work with supply and demand. That is a good realistic thing to put in a mod.