Golang : A simple forex opportunities scanner

Below is a simple program that will scan for trading opportunities. Basically what this program does is to calculate a given cross(instrument) 1 hour RSI value and display the result on screen.

What this program does is to help me in focusing on crosses that have good trading potential. Kinda like those instruments found in a cockpit, this is just one of a "trading instruments" that I use to sniff for opportunities.

Disclaimer : It is not meant for a fully automated trading bot but rather for my own viewing. Use it at your own risk!!

Here you go!

 package main

 import (
  "fmt"
  "strconv"
  "strings"
  "time"

  "github.com/awoldes/goanda"
  "github.com/markcheno/go-talib"
 )

 func main() {

  // put Oanda.com API key and account  ID here
  oandaAccountID := ""
  oandaAPIKey := ""

  // set the NewConnection 3rd parameter to [false] to use DEMO account.
  // [true] for LIVE account

  fmt.Println("Starting Oanda Trading bot....")
  UsingLIVEAccount := false // set false to use https://api-fxpractice.oanda.com
  oanda := goanda.NewConnection(oandaAccountID, oandaAPIKey, UsingLIVEAccount)

  // list of crosses from
  // https://www.socketloop.com/tutorials/golang-get-a-list-of-crosses-instruments-available-to-trade-from-oanda-account
  temp := "USD_DKK,EUR_AUD,CHF_JPY,EUR_SGD,USD_JPY,EUR_TRY,USD_CZK,GBP_AUD,USD_PLN,USD_SGD,EUR_SEK,USD_HKD,EUR_NZD,SGD_JPY,AUD_CAD,GBP_CHF,USD_THB,TRY_JPY,CHF_HKD,AUD_USD,EUR_DKK,EUR_USD,AUD_NZD,SGD_HKD,EUR_HUF,USD_CNH,EUR_HKD,EUR_JPY,NZD_USD,GBP_PLN,GBP_JPY,USD_TRY,EUR_CAD,USD_SEK,GBP_SGD,EUR_GBP,GBP_HKD,USD_ZAR,AUD_CHF,USD_CHF,USD_MXN,GBP_USD,EUR_CHF,EUR_NOK,AUD_SGD,CAD_CHF,SGD_CHF,CAD_HKD,USD_INR,NZD_CAD,GBP_ZAR,NZD_SGD,ZAR_JPY,CAD_JPY,GBP_CAD,USD_SAR,NZD_CHF,NZD_HKD,GBP_NZD,AUD_HKD,EUR_CZK,CHF_ZAR,USD_HUF,NZD_JPY,HKD_JPY,CAD_SGD,USD_NOK,USD_CAD,AUD_JPY,EUR_PLN,EUR_ZAR"

  // first, clean/remove the comma
  cleaned := strings.Replace(temp, ",", " ", -1)

  // crosses to monitor
  crossesToMonitor := strings.Fields(cleaned)

  fmt.Println("Crosses to monitor : ")
  fmt.Println(crossesToMonitor)

  // We want to scan for crosses with RSI above 60 and below 40
  // every 15 seconds
  go ScanCrossByRSI(oanda, crossesToMonitor, 15)

  select {} // this will cause the program to run forever until termination

 }

 //--------------------------------------------------------------------------------------------------------

 func ScanCrossByRSI(oanda *goanda.OandaConnection, crosses []string, intervalSecond int) {

  counter := time.Tick(time.Duration(intervalSecond) * time.Second) // poll every 15 seconds
  for range counter {
 for k, v := range crosses {
 rsi := GetOneHourRSI(oanda, v)
 rsiStr := strconv.FormatFloat(rsi, 'f', 6, 64) // convert float64 to string

 if rsi >= 60 {
 if rsi >= 70 {
 fmt.Println(k, v, "RSI : "+rsiStr+" >= 70 [***SHORT***]")
 } else {
 fmt.Println(k, v, "RSI : "+rsiStr+" >= 60 [MAYBE SHORT]")
 }
 } else if rsi <= 40 {
 if rsi <= 30 {
 fmt.Println(k, v, "RSI : "+rsiStr+" <= 30 [***LONG***]")
 } else {
 fmt.Println(k, v, "RSI : "+rsiStr+" <= 40 [MAYBE LONG]")
 }
 } else {
 fmt.Println(k, v, "RSI : "+rsiStr)
 }

 }
  }
 }

 func GetOneHourRSI(oanda *goanda.OandaConnection, cross string) float64 {

  length := 14

  // See http://developer.oanda.com/rest-live-v20/instrument-ep/#collapse_2_example_curl_1
  // and for the candlestick granularity ... see
  // http://developer.oanda.com/rest-live-v20/instrument-df/#CandlestickGranularity

  // Get 100 candles with 1 hour granularity
  data := oanda.GetCandles(cross, "100", "H1") // H1 = 1 hour
  closeSlice := make([]float64, len(data.Candles))

  // calculate RSI
  for i := 0; i < len(data.Candles); i++ {
 closeSlice[i] = data.Candles[i].Mid.Close
  }

  rsiSlice := talib.Rsi(closeSlice, length)
  rsi := rsiSlice[len(rsiSlice)-1] // match tradingview.com RSI
  return rsi

 }

Sample output:

0 USD_DKK RSI : 51.451647

1 EUR_AUD RSI : 56.934427

2 CHF_JPY RSI : 50.384710

3 EUR_SGD RSI : 56.429897

4 USD_JPY RSI : 52.345976

5 EUR_TRY RSI : 47.017935

6 USD_CZK RSI : 48.813204

7 GBP_AUD RSI : 54.111088

8 USD_PLN RSI : 51.368513

9 USD_SGD RSI : 58.852058

10 EUR_SEK RSI : 60.429787 >= 60 [MAYBE SHORT]

11 USD_HKD RSI : 55.950313

12 EUR_NZD RSI : 73.207817 >= 70 [***SHORT***]

13 SGD_JPY RSI : 45.009616

Reference:

https://www.socketloop.com/blogs/don-t-trade-without-guiding-instruments-and-bot