NewStrategy creates a new strategy with the given entry and exit conditions.

AndExpression is a concrete expression that represents a logical AND operation.

Condition is a value object that represents a single condition used in a trading strategy.

MarketData is a context that holds the necessary data for market data.

NilExpression is a concrete expression that represents a nil value.

OrExpression is a concrete expression that represents a logical OR operation.

StrategyParameters that encapsulates the parameters of a trading strategy.

Expression is an interface that represents a mathematical expression.