Semaphore signal indicator triggering when the JMACandle candles change their direction.

//+----------------------------------------------+  //|  INDICATOR INPUTS                            |  //+----------------------------------------------+  input Smooth_Method MA_Method1=MODE_JJMA;              //smoothing method  input int Length1=30;                                  //smoothing depth                      input int Phase1=15;                                   //smoothing parameter,  //---- for JJMA, changing within -100 ... +100, affects the transient process quality;  //---- For VIDIA this is CMO period, for AMA this is a slow average  input uint Gap=10;                                     //not considered gap in points  input uint BuySymb=171;                                //Buy symbol  input uint SellSymb=171;                               //Sell symbol

To replace the values of the two last inputs, use the Wingdings font symbols table.

The indicator uses SmoothAlgorithms.mqh library classes (copy it to <terminal_data_folder>\MQL5\Include). The use of the classes was thoroughly described in the article "Averaging Price Series for Intermediate Calculations Without Using Additional Buffers".

Fig. 1. JMACandleTrend indicator