Object analysis is a type of data analysis technique that involves breaking down complex data sets into smaller, more manageable objects or entities. This approach is often used in financial analysis to compare trading activities and identify patterns or trends in the market.

There are several types of object analysis techniques that can be used to compare trading activities, including:

1. Time series analysis: Time series analysis involves analyzing a sequence of data points over time to identify patterns and trends. This technique is often used to compare trading activities over different time periods and to identify patterns in market behavior.
2. Cluster analysis: Cluster analysis involves grouping similar objects or entities together based on their attributes or characteristics. This technique can be used to identify clusters of trading activities that share similar patterns or trends, and to compare these clusters over time.
3. Principal component analysis: Principal component analysis is a statistical technique that involves identifying the underlying factors that explain the variance in a data set. This technique can be used to identify the key drivers of trading activities and to compare these drivers across different time periods or markets.
4. Network analysis: Network analysis involves analyzing the relationships between different entities or objects in a data set. In the context of trading activities, network analysis can be used to identify the connections between different traders, market makers, or trading venues, and to compare these connections over time.
5. Regression analysis: Regression analysis involves analyzing the relationship between one or more independent variables and a dependent variable. This technique can be used to identify the factors that are driving trading activities and to compare these factors across different time periods or markets.

In conclusion, object analysis is a useful technique for comparing trading activities and identifying patterns or trends in the market. There are several types of object analysis techniques that can be used, including time series analysis, cluster analysis, principal component analysis, network analysis, and regression analysis. The choice of technique will depend on the specific data set and research question being analyzed.