Fig. 1From: An empirical behavioral order-driven model with price limit rulesLong memory in order directions. a Plots of the fluctuation functions \(F(\ell )\) of order directions for four stocks 000001, 000839, 200488 and 200625. The solid lines are the least squares fits to the data. The scaling curves for 000839, 200488 and 200625 have been shifted vertically for clarity. b Histograms of Hurst exponents \(H_s\) of order directions for all the 43 stocksBack to article page