Yes, here's an extract from the manual, chapter "Triggered Betting - Reference - Variables - Excel-Bound Variables":
Syntax
cell_[sheet_name]_[cell_address]
The [sheet_name] and [cell_address] are the address of the cell a value is stored in. The sheet must exist in the Excel file MF Pro is connected to, and the cell's address must comply with Excel notation. For example:
- cell_sheet1_B3
- cell_mysheet_A4