• Data reference period (Month)
• Geographic localization (Portugal)
• Type of trade

• ENTERPRISE:  Legal entity (natural or legal person) that is an organisational unit producing goods or services, which benefits from a certain degree of autonomy in decision-making, especially for the allocation of its current resources. An enterprise carries out one or more activities at one or more locations.
• REFERENCE PERIOD:  The length of time for which data are collected, e.g. a specific day, month or year.

Trade Confidence Indicator  is calculated according to the methodology of the EC - DG ECFIN, and corresponds to the arithmetic mean of the balances of the following questions:
- How has (have) your business activity (sales) developed over the past 3 months? It has… (They have...) 1. + improved (increased); 2. = remained unchanged; 3. − deteriorated (decreased).
- How do you expect your business activity (sales) to change over the next 3 months? It (They) will... 1. + improve (increase); 2. = remain unchanged 3. − deteriorate (decrease).
- [Inverted Sign] Do you consider the volume of stock you currently hold to be...? 1. + too large (above normal); 2. = adequate (normal for the season); 3. − too small (below normal).