There is no one-size-fits-all attention metric because one needs to be aware of the context and optimize for different objectives and risk appetites. What matters is that attention is one of the key elements of a trust decision system, being the others the probability of gain, the expected gain, and the fraction of capital that the investor is willing to risk \cite{J_sang_2004}. And that trust is built when visibility increases, while trust is resolved when an investment is realized \cite{krabec2017}.