Sharif University of Technology Scientia Iranica 1026-3098 Articles in Press 2025 01 27 A hybrid approach for a novel dynamic trading system to produce robust cryptocurrency portfolios 23802 10.24200/sci.2025.64948.9205 EN Ehsan Mohammadian Amiri Department of Industrial Engineering and Management Systems, Amirkabir University of Technology, Tehran, Iran Akbar Esfahanipour Department of Industrial Engineering and Management Systems, Amirkabir University of Technology, Tehran, Iran Journal Article 2024 08 03 This study aims to develop a dynamic portfolio trading system for high-risk profiles of cryptocurrencies in two phases: 1) portfolio selection and 2) portfolio construction. In the first phase, we propose a novel algorithmic trading model applying a Convolutional Neural Network (CNN) using a 2-D convolution layer with eight kernels of 3×3 sizes based on the prediction of selected technical indicators to predict buy/sell trading signals. To effectively increase the accuracy of the CNN model, first, the H-step ahead predictions of the selected technical indicators based on Long-short-term-memory (LSTM) along with the indicators themselves have been used to construct input matrices of the CNN model. A new price labeling approach was proposed to determine buying or selling points using the zigzag indicator (ZZ) in our CNN model. Assets with buy signals have been selected to construct the proposed portfolio. In the second phase, we propose a novel robust approach based on Holt-Winters-Multiplicative (HWM) to determine the realized crypto portfolio weights robustly by considering the seasonal effects. The experimental results show that our developed system outperforms the competing models for 30 cryptocurrencies with a high-risk profile in the two phases. https://scientiairanica.sharif.edu/article_23802_fbe9b18f3850b0ec536b9adbcaf7bdcb.pdf