You can always use e-commerce extensions for UD4 or MX, or write your own scripts/extensions.
MX by itself has nothing to do with e-commerce.
Personally, I use another tool - CCS for ultra-fast creation of back ends (w/Access & SQL Server DBs) and 75% of front ends, MX with extensions for tuning up design and e-commerce elements & PayPal shopping cart.
Of course, some things will need hand-coding.