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Point value in MT4

Can someone explain what Point means in MT4/MQL? For example - in FX what would be the point value for EUR/USD? What about USD/JPY? Would it be .0001 for EUR and .01 for JPY? How about index futures? What would be a point for ES, ER2, YM? .25, .10, 1? Sorry I am trying to figure out exactly what it