With earnings season underway, investors are understandably turning attention to bellwether reports.And few are more eagerly anticipated than Apple.With the technology titan scheduled to release earnings in about two weeks what should you be watching?Although there are many company specific metrics that pros will use to trade Apple, CNBC's Fast Money traders say the Street will also be using Apple as a broader economic ‘tell.’

Specifically, they’ll be looking to see what Apple has to say about China . With reports hitting the market on almost a daily basis that China is struggling to maintain growth Apple earnings could reveal all of China’s secrets – that is if there are any.“If we find out Apple is seeing a deceleration of sales in China – it will trigger downside,” says trader Dan Nathan. In other words, if Apple gets dinged by the Chinese economy, pros will assume every multi-national will get dinged. The Street will say if Apple can’t make it through unscathed, nobody can.

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