Here is the 'NonLagZigZag Fibonacci' indicator. You can input any Fibonacci level and not only the 76.4 level. If you only want to use the 76.4, just leave the other level inputs blank or 0.
I made the indicator to be flexible. The level inputs do not need to be in order. For example, you can go from 38.2 to 76.4 to 23.6. Or you can go from 76.4 to 23.6 to 61.8. The order doesn't matter. Also, you can skip inputs entirely and it won't affect the indicator. For example, if you only want to use the 76.4, you can have levels 0-4 blank and input the 76.4 for level 5. Or you can input the 76.4 anywhere you want. Just test the indicator and you will see what I mean.