Getting -129% accuracy

How to approach this problem as this is a regression problem?
I was using the method as described in the link https://towardsdatascience.com/predicting-stock-prices-using-a-keras-lstm-model-4225457f0233

but got accuracy as mentioned above

Hey @Saurabh-Mittal-1729567117136176, make sure you have normalized the data as required. Also since this is part of leader board challenge, you mail fail many times, but to provide the solution directly doesn’t ethical to share the solution direcly. Try out various things yourself. This is time your learning comes to test. So explore new things and try out them.

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