If fighting takes place between kings, that is indicative of turmoil.If it takes place among the people, that is indicative of a rise in prices.
If it takes place between the king and his subjects, that is indicative of falling prices, because when the people are hungry there will be turmoil among them, because they are all competing for food stored by the king,and that leads to fighting among them.
But if they have their fill, they will start to transgress and the king will need to keep them in check, so there will be fighting between him and them. Hence we said that it is indicative of falling prices. This is by implication.
