hi there i read a lot about currency strengh in net.there are many softwares that calculates currency strength.some are free and some are not.

i wonder what is behind the currency strentgh calculation?what is the algorithm and formula to find it.yee i can search internet but i really dont find anything usefull.so i post this thread.there are many premium softwares like accustrengh forex grail.i download currecny strentgh meter for free.is it different from premium softwares algorithm or all of them use the same formula to calculate the strentgh

i wonder what is behind the currency strentgh calculation?what is the algorithm and formula to find it.yee i can search internet but i really dont find anything usefull.so i post this thread.there are many premium softwares like accustrengh forex grail.i download currecny strentgh meter for free.is it different from premium softwares algorithm or all of them use the same formula to calculate the strentgh