Create deal report filtered on close date (this year) and deal stage (any won), then display data from close date and amount. This will produce a bar report with close date and ammount shown. Here's an example from a test portal:
Create deal report filtered on close date (this year) and deal stage (any won), then display data from close date and amount. This will produce a bar report with close date and ammount shown. Here's an example from a test portal: