With the kind help of Mrtools we've improved an old grid indicator (thanks to Alejandro Galindo) and made it user friendly with the ability to chose your line style, color and round number from the indicator's options.
Personally I use it on setting "100" to mark major 00 round number areas eg. 1.22000, 1.23000 etc. and I chose to display Period Separators in MT4 to give it a proper "Grid" look.
PS: JADragon if you're still looking for a Grid maker try this out!