recompiled for MT5 update.

A large update, now you can change other chart.
//The following options are used to change other open charts：
input bool OtherOpenChart_Symbol = false; //Change symbol on other open chart?
input bool OtherOpenChart_TimeFrame = false; //Change timeframe on other open chart?
input int PermitCount = 0; //Just change the count of initially opened chart. 0 means all.

PS:
I must tell you, When switching between multi charts, the system will download the data, If your system doesn't have data, it will download the data and sometime will cause slowdowns. That is the limited of MT5/MT4 client.

Change TurnOn parameter to :
bool TurnOn_UpDown=true; // Turn on the UP/DOWN key function to change Symbol.
bool TurnOn_LeftRight=true; // Turn on the LEFT/RIGHT key function to change TimeFrame.
Now, you can choose the change mode.

add the parameter to turn on/off the directional key funcion.

If you add this indicator more than once, the system will alert you.

Hide the text, and move it to program description.