How Are Points Selected in the Balance & Equity Graph of a Backtest

[yyk03]

Hi everyone,

I want to know that how are points selected in the balance & equity graph of a backtest in MT4/MT5.

For example, in a  balance & equity graph, we can find continuous points A, B, C in a balance & equity graph.

Point A: Balance $1000, Equity $1000, Time 09.10.2020 18:00

The next point B:  Balance $1010, Equity $1005, Time 09.10.2020 18:03

The next point C:  Balance $1015, Equity $1018, Time 09.10.2020 18:12

So my question is how are point A, B, C selected? Why it is Point A, B, C at 18:00, 18:03, 18:12, not other points like A', B', C' at 17:59, 18:05, 18:10?

I checked trades and price chart. It doesn't look like points are selected at entry/exit timings or at the local min/max point of balance/equity.

By the way, why I concern this issue is because I don't want to miss an equity drop which is between two points so is not reflected in the balance & equity graph.

Thank you very much!