Amer Bakhach

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Most of existing studies sample markets' prices as time series when developing models to predict market's trend. Directional Changes (DC) is an approach to summarize market prices other than time series. DC marks the market as downtrend or uptrend based on the magnitude of prices changes. In this paper we address the problem of forecasting trend's direction(More)
Directional Change (DC) is a technique to summarize price movements in a financial market. According to the DC concept, data is sampled only when the magnitude of price change is significant according to the investor. Unlike with time series, DC samples data at irregular time intervals. In this paper, we propose a contrarian trading strategy that is based(More)
Resource discovery is a real challenge in grid systems due to the dynamicity of nodes (i. e. any node can join or leave the system at any moment). This paper proposes a new protocol for resource discovery in dynamic grid systems. The hypothesis is that a grid is composed from a set of Virtual Organization (VO). The idea is to define a Distributed Hash(More)
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