I was inspired by the alpaca’s idea of using google spreadsheet as a test environment for auto algo trading. So I decided to make a version for bitcoin paper test trading. For alpaca’s stock version, you can find the details here. The google spreadsheet will look like this:

btc_spreadsheet

I am using coinbase api to get the lastest Bitcoin price. And there is already one google app script class that you can use - Class UrlFetchApp. Then you need to call this class in your function.

function myFunction() {
 // Make a GET request and log the returned content.
  var response = UrlFetchApp.fetch('https://api.coinbase.com/v2/prices/BTC-USD/spot');
  var fact = response.getContentText();
  var json = JSON.parse(fact)
 
  Logger.log(json.data.amount)
  var sheet = SpreadsheetApp.getActiveSheet();
  var lastRow = sheet.getLastRow();
  
  
  for (var i = 2; i <= lastRow; i++){
// update each row to set the latest bitcoin price
  sheet.getRange(i,1).setValue([json.data.amount]);
  
  }
  ...
}
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Now we need to do some small calculation to update the position status (open, close and closed profit/loss). We can use the class sheet. Then the script will be some thing like this:

function myFunction() {
    ...
    for (var i = 2; i <= lastRow; i++ ){
        
        var status = sheet.getRange(i,9).getValues();
        var price = sheet.getRange(i,1).getValues();
        var direction = sheet.getRange(i,2).getValues();
        var buy = sheet.getRange(i,3).getValues();
        var sell = sheet.getRange(i,4).getValues();
        var limit = sheet.getRange(i,5).getValues();
        var stop = sheet.getRange(i,6).getValues();
        var size = sheet.getRange(i,7).getValues();
    
    
    if ( status[0][0] == "closed"){}
    else { 
      
      if ( direction[0][0] =="long"){ if(price-buy<limit && buy-price<stop){
        //  Logger.log("still open")
        sheet.getRange(i,9).setValue("open");
        var pl = (price-buy)*size
        sheet.getRange(i,8).setValue(pl);
      
      }else{
        // Logger.log("closed")
        sheet.getRange(i,9).setValue("closed");
        var pl = (price-buy)*size
        sheet.getRange(i,8).setValue(pl);
        
      }}
      
      else{
        if( direction[0][0] =="short" ){
        if(sell-price<limit && price-sell<stop){
        //  Logger.log("still open")
        sheet.getRange(i,9).setValue("open");
        var pl = (sell-price)*size
        sheet.getRange(i,8).setValue(pl); 
       
        }else{
        // Logger.log("closed")
        sheet.getRange(i,9).setValue("closed");
        var pl = (sell-price)*size
        sheet.getRange(i,8).setValue(pl); 
        }
       }
      }
    }
  }
}
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You can find the source code here. Please feel free to 👉📱message my twilio bot +447479275693. I will come back to you shortly 😃.

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