How to normalize ROC?

AFL Programming
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If two stocks both have a ROC equal to 10, but their stock prices are wildy different, how do I go about normalizing the ROC value?

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@Stian133, ROC() in AmiBroker calculates the periods rate-of-change of ARRAY expressed as PERCENTAGE.

If you invest the same amount of money on 2 stocks, even if they have wildly different prices, and, for example, both will have a ROC of 10%, you'll get the same gain returned from both of them.

Stock A: bought 200 shares at   5.0 - Amount invested 1000.0 - ROC 10% = Amount gained: 100.0
Stock B: bought  10 shares at 100.0 - Amount invested 1000.0 - ROC 10% = Amount gained: 100.0

So It escapes me what you mean by "normalize" in this case. Please, elaborate your query.

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