I Gede Etika Ari Wibawa. “USABILITY TESTING OF THE IFS PRO ANDROID MOBILE APPLICATION FOR CRYPTOCURRENCY TRADING SIGNAL FORECASTING USING THE CONCURRENT THINK-ALOUD (CTA) TECHNIQUE AND PERFORMANCE MEASUREMENT”. Multidiciplinary Output Research For Actual and International Issue (MORFAI), vol. 6, no. 3, Mar. 2026, pp. 4217-24, doi:10.5281/zenodo.20984295.