When you trade in crypto with a broker like Binance any open position might not show proper unrealized than 0.0. I am unsure if it is volume related but smaller coins might stay at 0.0 I show to use these features to help in fixing this. I made a video to learn about this.

https://www.motivewave.com/support/how_to/use_a_display_mask.htm

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https://quantlabs.net/blog/2020/10/learn-motivewave-digital-mask-and-minimilization-tick/