trader_plus_dm Plus Directional Movement &reftitle.description; arraytrader_plus_dm arrayhigh arraylow integertimePeriod &reftitle.parameters; high &trader.arg.array.of.real.high; low &trader.arg.array.of.real.low; timePeriod &trader.arg.time.period; &reftitle.returnvalues; Returns an array with calculated data or false on failure.