1. A system for instability detection and structure estimation of a complex network, the system comprising: one or more processors and a memory, the memory being a non-transitory computer-readable medium having executable instructions encoded thereon, such that upon execution of the instructions, the one or more processors perform operations of: identifying nodes and features to be measured from the complex network; receiving data from each node over a time series, the data representing, dynamics of the complex network; determining a first time window, the time window having a fixed window size; calculating a covariance matrix for a time series inside the first time window; calculating eigenvalues μ i , for the covariance matrix; moving the time window by one time to form a second time window; calculating a second covariance matrix for a time series inside the second time window; calculating eigenvalues for the second covariance matrix; and determining stability of the complex network.