Amazon FBA Market Trend Research

I’m looking for focused help with Amazon FBA product research, but not the usual hunt-and-peck for random “profitable” items. What I need is a clear picture of where Amazon’s demand is heading so I can act early and source inventory that rides the next wave, not yesterday’s bestseller list... (Budget: $10 - $30 USD, Jobs: Amazon FBA, Business Analysis, Business Development, Data Analysis, Data Mining, Data Visualization, Keyword Research, Market Research)