### Introduction

The strong and weak indicator compares eight most traded FX currencies gains based on each currency percentage gain on some specific FX pairs.

The current version of Strong and weak shows the USD, EUR, GBP, JPY, AUD, CHF, CAD, and NZD percentage gain based on this FX symbols:

- EURUSD
- GBPUSD
- USDJPY
- AUDUSD
- USDCHF
- USDCAD
- AUDCAD
- AUDCHF
- AUDNZD
- EURAUD
- EURCHF
- EURGBP
- GBPAUD
- GBPCHF
- NZDUSD
- EURJPY
- GBPJPY
- AUDJPY
- CHFJPY
- CADJPY
- EURCAD
- GBPCAD
- NZDJPY
- GBPNZD
- EURNZD
- CADCHF
- NZDCAD
- NZDCHF

Each symbol percentage change of x previous bars (Periods) are summed up and then that symbol value will be added to the symbol base currency and it will be subtracted from the symbol quote currency percentage return, ex:

```
Periods = 50
EURUSD Daily chart 50 last bars percentage change sum result = +6.2%
GBPUSD Daily chart 50 last bars percentage change sum result = +4.6%
EURGBP Daily chart 50 last bars percentage change sum result = +2.1%
USDJPY Daily chart 50 last bars percentage change sum result = -3.8%
USDCHF Daily chart 50 last bars percentage change sum result = -5.2%
EURCHF Daily chart 50 last bars percentage change sum result = +1.2%
USD % return = ((-6.2) - (+4.6) + (-3.8) + (-5.2)) / number of pairs (4)
EUR % return = (+6.2) + (+2.1) + (+1.2) / number of pairs (3)
GBP % return = (+4.6) - (+2.1) / number of pairs (2)
```

The same formula will be used for all symbols and currencies, in multi time-frame version each symbol different defined time frames percentage return is added.

**Loading 28 symbol data set gets some decent amount of time so be patient with "Loading symbols data, please wait..." message**