Make rankings of:

-Top viewed products
-Top viewed categories
-Top purchased products
-Top reviewed products (optional: define a rating)
-Top grossing products

Combine the list above with any of the possible filters:

-Current category products
-Current category (and its children categories) products
-Specific category products
-Specific category (and its children categories) products
-All category/products (equivalent to no filter)

Additionally, optionaly filter by user options:

-Current vieweing user (actions done only by that user)
-Specific user (actions done only by that user)

And, of course, combine the two lists above selecting your desired timeframe, in the "relative time" mode:

-Last hour
-Last 6 hours
-Last 12 hours
-Last day
-Last 3 days
-Last 5 days
-Last week
-Last 2 weeks
-Last month
-Last 6 months
-Last year
-All time

Or in the "absolute time" mode:

-Today
-Yesterday
-This week
-Last week
-This month
-Last month
-This year
-Last year

Show evolution of:

-Product views
-Category views
-Product purchases
-Number of Orders
-Product reviews
-Product/total grossing

Combine the list above with any of the possible filters:

-Current category/product being shown
-Current category
-Current category (and its children categories)
-Specific category/product
-Specific category
-Specific category (and its children categories)
-All category/products (equivalent to no filter)

Additionally, optionaly filter by user options:

-Current vieweing user (actions done only by that user)
-Specific user (actions done only by that user)

And, of course, combine the two lists above selecting your desired timeframe, to complete the chart's x-axis to show the items evolution:

-Last X days (define the number of days you want to consider)
-Last X months (define the number of months you want to consider)