{"id":9671727,"date":"2024-02-12T00:06:23","date_gmt":"2024-02-11T21:06:23","guid":{"rendered":"https:\/\/www.iee.ihu.gr\/?post_type=phd_students&#038;p=9671727"},"modified":"2024-02-14T15:56:06","modified_gmt":"2024-02-14T12:56:06","slug":"%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2","status":"publish","type":"phd_students","link":"https:\/\/www.iee.ihu.gr\/en\/phd_students\/%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2\/","title":{"rendered":"Bilis Efstratios"},"content":{"rendered":"<p>My PhD research focuses on building machine learning models, particularly transformers, to<br \/>\npredict the next day&#8217;s close price for various currencies using time series data. The research<br \/>\ninvestigates the accuracy results of machine learning models applied in the forex field,<br \/>\nspecifically focusing on currency pairs such as AUD\/CAD, EUR\/AUD, EUR\/CAD, EUR\/DKK,<br \/>\nEUR\/JPY, GBP\/AUD, NZD\/USD, USD\/CAD, USD\/JPY, MYR\/USD, USD\/SGD, BRL\/USD,<br \/>\nand NOK\/USD. Various ML models, including Linear Regression, Random Forest, Stochastic<br \/>\nGradient Descent (SGD), XGBoost (XGB), Long Short-Term Memory (LSTM), and<br \/>\nTransformers, have been developed for this purpose This entails collecting and preprocessing<br \/>\nrelevant financial data, designing and training transformer-based models optimized for<br \/>\nforecasting, and evaluating their performance. The evaluation includes backtesting and<br \/>\nperformance analysis using a comprehensive dataset spanning from 1999 to 2022. Metrics such<br \/>\nas Mean Absolute Error (MAE), Mean Squared Error (MSE), and Mean Squared Percentage<br \/>\nError (MAPE) are utilized to assess the models&#8217; effectiveness in capturing and predicting the<br \/>\nnext day&#8217;s close price.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"class_list":["post-9671727","phd_students","type-phd_students","status-publish","hentry"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"msvalidate.01\" content=\"871A57EDDBA4CA012E1AD79825D67305\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.iee.ihu.gr\/en\/phd_students\/%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/#listItem\",\"name\":\"\\u03a5\\u03c0\\u03bf\\u03c8\\u03ae\\u03c6\\u03b9\\u03bf\\u03b9 \\u0394\\u03b9\\u03b4\\u03ac\\u03ba\\u03c4\\u03bf\\u03c1\\u03b5\\u03c2\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/#listItem\",\"position\":2,\"name\":\"\\u03a5\\u03c0\\u03bf\\u03c8\\u03ae\\u03c6\\u03b9\\u03bf\\u03b9 \\u0394\\u03b9\\u03b4\\u03ac\\u03ba\\u03c4\\u03bf\\u03c1\\u03b5\\u03c2\",\"item\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2\\\/#listItem\",\"name\":\"Bilis Efstratios\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/%ce%bc%cf%80%ce%af%ce%bb%ce%b7%cf%82-%ce%b5%cf%85%cf%83%cf%84%cf%81%ce%ac%cf%84%ce%b9%ce%bf%cf%82-2\\\/#listItem\",\"position\":3,\"name\":\"Bilis Efstratios\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/phd_students\\\/#listItem\",\"name\":\"\\u03a5\\u03c0\\u03bf\\u03c8\\u03ae\\u03c6\\u03b9\\u03bf\\u03b9 \\u0394\\u03b9\\u03b4\\u03ac\\u03ba\\u03c4\\u03bf\\u03c1\\u03b5\\u03c2\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.iee.ihu.gr\\\/en\\\/#organization\",\"name\":\"T\\u03bc\\u03ae\\u03bc\\u03b1 \\u039c\\u03b7\\u03c7\\u03b1\\u03bd\\u03b9\\u03ba\\u03ce\\u03bd \\u03a0\\u03bb\\u03b7\\u03c1\\u03bf\\u03c6\\u03bf\\u03c1\\u03b9\\u03ba\\u03ae\\u03c2 \\u03ba\\u03b1\\u03b9 \\u0397\\u03bb\\u03b5\\u03ba\\u03c4\\u03c1\\u03bf\\u03bd\\u03b9\\u03ba\\u03ce\\u03bd \\u03a3\\u03c5\\u03c3\\u03c4\\u03b7\\u03bc\\u03ac\\u03c4\\u03c9\\u03bd\",\"description\":\"[:el]\\u03a0\\u03bf\\u03bb\\u03c5\\u03c4\\u03b5\\u03c7\\u03bd\\u03b9\\u03ba\\u03ae \\u03a3\\u03c7\\u03bf\\u03bb\\u03ae - 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